JP2014171403A - Pruning machine - Google Patents

Pruning machine Download PDF

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JP2014171403A
JP2014171403A JP2013044375A JP2013044375A JP2014171403A JP 2014171403 A JP2014171403 A JP 2014171403A JP 2013044375 A JP2013044375 A JP 2013044375A JP 2013044375 A JP2013044375 A JP 2013044375A JP 2014171403 A JP2014171403 A JP 2014171403A
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cutting
blade
cutting edge
edge
blades
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JP6062770B2 (en
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Atsuto Okada
厚人 岡田
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Ryobi Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a pruning machine which prevents deterioration in cutting performance of cutting blades.SOLUTION: A pruning machine includes a pair of upper and lower blades 51 and 61, where a plurality of cutting blades 53 and 63 are provided in a row on the sides of long parts 52 and 62, cutting a plant by reciprocating while keeping themselves in a sliding-contact state. Rake faces 53b and 63b are formed on cutting edge parts 53a and 63a of the cutting blades 53 and 63 so that a component force generated by cutting resistance occurring when cutting, which forces the cutting blades 53 and 63 to press each other, is smaller on the side of a blade end compared to on the side of a blade base.

Description

本発明は、樹木や芝草の刈込みに使用する刈込み機に関するものである。   The present invention relates to a trimming machine used for trimming trees and turfgrass.

従来より、草木の刈込みに使用される刈込み機としてヘッジトリマが知られている。このヘッジトリマには長尺部の側方に複数の切断刃が櫛歯状に列設された上下一対の板状のブレードが備えられている。各ブレードは、駆動源からの駆動により互いに摺接した状態で長手方向の往復運動を異なる位相で行うことで、切断刃間に進入した草木を切断することができるように構成されている。具体的には、上下一対のブレードの長尺部の上方および下方には上ブレードホルダと下ブレードホルダが配置されており、上ブレードホルダと下ブレードホルダの間に固定された複数のガイドスペーサに、各ブレードの長尺部に形成された複数の長孔を嵌合させることで、長手方向の往復運動が可能となっている(例えば下記特許文献1参照)。   Conventionally, a hedge trimmer is known as a trimming machine used for trimming vegetation. This hedge trimmer is provided with a pair of upper and lower plate-like blades in which a plurality of cutting blades are arranged in a comb-like shape on the side of the long portion. Each blade is configured to be able to cut a plant that has entered between the cutting blades by performing reciprocal movement in the longitudinal direction in different phases while being in sliding contact with each other by driving from a driving source. Specifically, an upper blade holder and a lower blade holder are disposed above and below the long portions of the pair of upper and lower blades, and a plurality of guide spacers fixed between the upper blade holder and the lower blade holder are provided. By reciprocating a plurality of long holes formed in the long part of each blade, reciprocation in the longitudinal direction is possible (for example, see Patent Document 1 below).

上述の構成において、ブレードの往復運動を可能とするためには、ガイドスペーサの上下方向の長さ、すなわち上ブレードホルダと下ブレードホルダとの間の距離を上下一対のブレードの上下方向厚さの合計よりわずかに大きく設定しなければならない。よって、上ブレードホルダと下ブレードホルダとの間において、ブレードの上下方向には隙間が形成されることになる。   In the above configuration, in order to enable the reciprocating movement of the blade, the vertical length of the guide spacer, that is, the distance between the upper blade holder and the lower blade holder is set to the vertical thickness of the pair of upper and lower blades. Must be set slightly larger than the total. Therefore, a gap is formed in the vertical direction of the blade between the upper blade holder and the lower blade holder.

実公平4−41816号公報Japanese Utility Model Publication No. 4-41816

上述のように、ブレードの上下方向に隙間が形成されていることで、切断刃には局所的に大きな接触圧が負荷されることになる。そこで、この点について図10および11を参照して説明する。   As described above, since the gap is formed in the vertical direction of the blade, a large contact pressure is locally applied to the cutting blade. This point will be described with reference to FIGS.

図10はヘッジトリマによる枝の切断状態を説明する図であり、(a)は正面図、(b)は断面C-Cを示している。図11は図10の断面D-Dを示している。図10および11に示されるように、上ブレード121の切断刃122および下ブレード123の切断刃124は、その刃先部122a,124aに摺動面122c,124cとすくい面122b,124bとで構成される刃先角γ,γが設定されており、上ブレード121と下ブレード123の往復運動により切断刃122,124が互い接近することで刃先部122a,124aにより枝131の切断作業を行うことができる。なお、刃先部122a,124aの刃先角γ,γは、一般的には45度程度に設定されている。また、ヘッジトリマにより枝を切断する場合、通常、切断刃(122,124)の刃末側(先端側)が主に使用されることになる。   FIGS. 10A and 10B are diagrams for explaining a cutting state of a branch by a hedge trimmer, where FIG. 10A is a front view and FIG. 10B is a cross-sectional view CC. FIG. 11 shows a cross section DD of FIG. As shown in FIGS. 10 and 11, the cutting blade 122 of the upper blade 121 and the cutting blade 124 of the lower blade 123 are configured by sliding surfaces 122c and 124c and scooping surfaces 122b and 124b on the blade edges 122a and 124a. Cutting edge angles [gamma], [gamma] are set, and the cutting operation of the branch 131 can be performed by the cutting edge portions 122a and 124a when the cutting blades 122 and 124 approach each other by the reciprocating motion of the upper blade 121 and the lower blade 123. . The blade edge angles γ and γ of the blade edge portions 122a and 124a are generally set to about 45 degrees. Moreover, when cutting a branch with a hedge trimmer, the blade end side (tip side) of the cutting blades (122, 124) is usually mainly used.

切断刃122,124により枝131を切断する場合、切断刃122,124の切断位置に働く切断抵抗により、切断刃122,124は、図10中の矢印線125,126で示す方向に進行しようとする。このため、図11で示されるように、切断刃122,124同士は切断位置が重なり合う方向に傾いた状態で互い接近していくことになる。このとき、符号127で示す切断位置より刃元側の切断刃122,124同士の摺接位置には局所的に大きい接触圧が負荷される。これにより、切断刃122,124の刃先部122a,124aの先端が互いに離間する方向に変形する「ダレ」と呼ばれる不具合が発生し、その結果、切断性能が著しく低下する可能性があった。   When the branch 131 is cut by the cutting blades 122 and 124, the cutting blades 122 and 124 try to advance in the directions indicated by the arrow lines 125 and 126 in FIG. 10 due to the cutting resistance acting on the cutting positions of the cutting blades 122 and 124. To do. For this reason, as shown in FIG. 11, the cutting blades 122 and 124 approach each other in a state where the cutting positions are inclined in the overlapping direction. At this time, a locally high contact pressure is applied to the sliding contact position between the cutting blades 122 and 124 closer to the blade base than the cutting position indicated by reference numeral 127. As a result, a problem called “sag” occurs in which the tips of the cutting edge portions 122a and 124a of the cutting blades 122 and 124 are deformed in a direction away from each other, and as a result, the cutting performance may be significantly deteriorated.

さらに、「ダレ」が発生した刃先部で草木の切断を行った場合、切断刃122,124同士の摺接により摺接面122c,124cに付着した草木のヤニを除去する機能が低下しているので、ヤニが切断刃122,124の摺接面122c,124cに堆積してしまう。その結果、切断刃122,124の間に隙間が形成され、「ダレ」が発生した箇所以外での切断性能も低下する可能性があった。   Furthermore, when cutting the vegetation at the cutting edge where “sag” occurs, the function of removing the vegetation sticking to the slidable contact surfaces 122c and 124c by the sliding contact between the cutting blades 122 and 124 is reduced. Therefore, the scum accumulates on the sliding contact surfaces 122c and 124c of the cutting blades 122 and 124. As a result, a gap is formed between the cutting blades 122 and 124, and there is a possibility that the cutting performance at a place other than the place where the “sag” occurs is also lowered.

本発明は、上述した課題の存在に鑑みてなされたものであって、その目的は、切断刃の切断性能の低下を防止した刈込み機を提供することである。   The present invention has been made in view of the above-described problems, and an object thereof is to provide a trimming machine that prevents the cutting performance of the cutting blade from being deteriorated.

本発明に係る刈込み機は、長尺部の側方に複数の切断刃が列設された上下一対のブレードが摺接状態を保ちながら往復運動して草木の切断を行う刈込み機であり、前記切断刃の刃先部には、切断時の切断抵抗により発生する切断刃同士を押し付ける方向の分力が刃元側に対して刃末側が小さくなるようにすくい面が形成されていることを特徴とする。   A trimming machine according to the present invention is a trimming machine that cuts vegetation by reciprocating while a pair of upper and lower blades in which a plurality of cutting blades are arranged on the side of the long portion while maintaining a sliding contact state, The cutting edge of the cutting blade is characterized in that a rake face is formed so that the component force in the direction of pressing the cutting blades generated by cutting resistance during cutting is smaller on the blade end side than on the blade base side. To do.

また、本発明に係る刈込み機においては、前記切断刃の刃先部には、刃元側の刃先角に対して刃末側の刃先角を小さくなるように前記すくい面を形成することができる。   In the trimming machine according to the present invention, the rake face can be formed on the cutting edge portion of the cutting blade so that the cutting edge angle on the blade end side is smaller than the cutting edge angle on the cutting edge side.

さらに、本発明に係る刈込み機においては、前記刃先角は、前記切断刃の刃元から刃末に向かって段階的に小さく設定することができる。   Further, in the trimming machine according to the present invention, the blade edge angle can be set to be small stepwise from the blade base of the cutting blade toward the blade edge.

さらにまた、本発明に係る刈込み機においては、前記刃先角は、前記切断刃の刃元から刃末に向かって連続的に小さく設定することができる。   Furthermore, in the trimming machine according to the present invention, the cutting edge angle can be set continuously smaller from the cutting edge of the cutting blade toward the cutting edge.

また、本発明に係る刈込み機においては、前記切断刃の刃先部には、刃元側のすくい面に対して刃末側のすくい面を狭くなるように前記すくい面を形成することができる。   In the trimming machine according to the present invention, the rake face can be formed on the cutting edge of the cutting blade such that the rake face on the blade end side is narrower than the rake face on the blade base side.

さらに、本発明に係る刈込み機においては、前記切断刃は、刃元側の厚さに対して刃末側の厚さを薄く設定することができる。   Furthermore, in the trimming machine which concerns on this invention, the said cutting blade can set the thickness of the blade end side thinly with respect to the thickness of a blade base side.

さらにまた、本発明に係る刈込み機においては、前記切断刃には、刃末側のすくい面に接続する逃がし面を形成することができる。   Furthermore, in the trimming machine according to the present invention, the cutting blade can be formed with a relief surface connected to the rake surface on the blade end side.

本発明によれば、切断刃の切断位置より刃元側の摺接位置に負荷される接触圧を低減させることで、切断刃の切断性能の低下を防止した刈り込み機を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the trimming machine which prevented the fall of the cutting performance of a cutting blade can be provided by reducing the contact pressure applied to the sliding contact position of a blade base side from the cutting position of a cutting blade.

第一の実施形態に係るヘッジトリマの正面図である。It is a front view of the hedge trimmer according to the first embodiment. 第一の実施形態に係るヘッジトリマの平面図である。It is a top view of the hedge trimmer concerning a first embodiment. 図2の断面Z−Zを示す図である。It is a figure which shows the cross section ZZ of FIG. 第一の実施形態に係るヘッジトリマの切断刃を説明する図であり、(a)は平面視、(b)は断面B1−B1、(c)は断面A1−A1を示している。It is a figure explaining the cutting blade of the hedge trimmer which concerns on 1st embodiment, (a) is planar view, (b) has shown cross section B1-B1, (c) has shown cross section A1-A1. 第二の実施形態に係るヘッジトリマの切断刃を説明する図であり、(a)は平面視、(b)は断面B2−B2、(c)は断面A2−A2を示している。It is a figure explaining the cutting blade of the hedge trimmer which concerns on 2nd embodiment, (a) is planar view, (b) has shown cross section B2-B2, (c) has shown cross section A2-A2. 第三の実施形態に係るヘッジトリマの切断刃を説明する図であり、(a)は平面視、(b)は断面B3−B3、(c)は断面A3−A3を示している。It is a figure explaining the cutting blade of the hedge trimmer which concerns on 3rd embodiment, (a) is planar view, (b) has shown cross section B3-B3, (c) has shown cross section A3-A3. 第四の実施形態に係るヘッジトリマの切断刃を説明する図であり、(a)は平面視、(b)は断面B4−B4、(c)は断面A4−A4を示している。It is a figure explaining the cutting blade of the hedge trimmer which concerns on 4th embodiment, (a) is planar view, (b) has shown cross section B4-B4, (c) has shown cross section A4-A4. 第五の実施形態に係るヘッジトリマの切断刃を説明する図であり、(a)は平面視、(b)は断面B5−B5、(c)は断面A5−A5を示している。It is a figure explaining the cutting blade of the hedge trimmer which concerns on 5th embodiment, (a) is planar view, (b) has shown cross section B5-B5, (c) has shown cross section A5-A5. 第六の実施形態に係るヘッジトリマの切断刃を説明する図であり、(a)は平面視、(b)は断面B6−B6、(c)は断面A6−A6を示している。It is a figure explaining the cutting blade of the hedge trimmer which concerns on 6th embodiment, (a) is planar view, (b) has shown cross section B6-B6, (c) has shown cross section A6-A6. ヘッジトリマによる枝の切断状態を説明する図であり、(a)は平面視、(b)は断面C-Cを示している。It is a figure explaining the cutting | disconnection state of the branch by a hedge trimmer, (a) is planar view, (b) has shown cross section CC. 図10の断面D-Dを示す図である。It is a figure which shows the cross section DD of FIG.

以下、本発明を実施するための好適な実施形態について、刈込み機であるヘッジトリマの場合について、図1から9を用いて説明する。なお、以下の実施形態は、各請求項に係る発明を限定するものではなく、また、実施形態の中で説明されている特徴の組み合わせの全てが発明の解決手段に必須であるとは限らない。   Hereinafter, a preferred embodiment for carrying out the present invention will be described with reference to FIGS. 1 to 9 in the case of a hedge trimmer as a trimming machine. The following embodiments do not limit the invention according to each claim, and all combinations of features described in the embodiments are not necessarily essential to the solution means of the invention. .

なお、本明細書では、図1中に示すように、「上、下、前、後」を規定して説明する。   In the present specification, as shown in FIG. 1, “upper, lower, front, rear” is defined and described.

図1から3に示すように、第一の実施形態に係るヘッジトリマは、ハウジング10と補助ハンドル21とガード板22とハウジング10から前方に突出する刈刃部50とを備えており、ハウジング10にはメインハンドル11が一体的に形成されている。メインハンドル11には刈刃部50の運転操作を行うためのトリガスイッチ12が備えられており、ハウジング10の内部には、刈刃部50を運転するための駆動部(不図示)が備えられている。駆動部には、駆動源であるモータと、モータの回転を刈刃部50の往復運動に変換するカム等からなる駆動伝達部とが備えられている。   As shown in FIGS. 1 to 3, the hedge trimmer according to the first embodiment includes a housing 10, an auxiliary handle 21, a guard plate 22, and a cutting blade portion 50 protruding forward from the housing 10. The main handle 11 is integrally formed. The main handle 11 is provided with a trigger switch 12 for operating the cutting blade part 50, and the housing 10 is provided with a drive part (not shown) for operating the cutting blade part 50. ing. The drive unit includes a motor that is a drive source and a drive transmission unit that includes a cam or the like that converts the rotation of the motor into a reciprocating motion of the cutting blade unit 50.

刈刃部50は、刈刃として板状の上ブレード51と下ブレード61を備えている。上下ブレード51,61は、前後に伸びる長尺部52,62と、長尺部52,62の両側方に櫛歯状に列設される複数の切断刃53,63を有している。上ブレード51の長尺部52の上方には金属製の板材を断面視コの字状に成形した上ブレードホルダ71が配置されており、下ブレード61の長尺部62の下方には金属製の板材からなる下ブレードホルダ72が配置されている。上ブレードホルダ71と下ブレードホルダ72の間には筒状のガイドスペーサ73が配置されている。上下ブレード51,61の長尺部52,62にはガイドスペーサ73が遊嵌する長孔54,64が形成されている。刈刃部50は、ガイドスペーサ73が長孔54,64に遊嵌した状態で、上方より、上ブレードホルダ71、上ブレード51、下ブレード61、下ブレードホルダ72の順に重ねた状態で、下側からネジ74を挿嵌し上方でナット75を締め付けることで、上ブレードホルダ71と下ブレードホルダ72がガイドスペーサ73を介して連結されるとともに、上ブレードホルダ71と下ブレードホルダ72の間で上ブレード51と下ブレード61が前後方向に移動可能に配置される。このため、ガイドスペーサ73で規定される上ブレードホルダ71と下ブレードホルダ72の間の距離は、上ブレード51と下ブレード61の厚さの合計よりわずかに大きく設定されている。なお、下ブレードホルダ72の後部はハウジング11の底面に固定されている。   The cutting blade portion 50 includes a plate-like upper blade 51 and a lower blade 61 as cutting blades. The upper and lower blades 51, 61 have long portions 52, 62 that extend in the front-rear direction, and a plurality of cutting blades 53, 63 that are arranged in a comb shape on both sides of the long portions 52, 62. Above the long portion 52 of the upper blade 51, there is disposed an upper blade holder 71 in which a metal plate is formed in a U-shape in cross-sectional view, and below the long portion 62 of the lower blade 61 is made of metal. A lower blade holder 72 made of this plate material is arranged. A cylindrical guide spacer 73 is disposed between the upper blade holder 71 and the lower blade holder 72. In the long portions 52 and 62 of the upper and lower blades 51 and 61, long holes 54 and 64 into which the guide spacers 73 are loosely fitted are formed. The cutting blade portion 50 has the guide spacer 73 loosely fitted in the long holes 54 and 64, and the upper blade holder 71, the upper blade 51, the lower blade 61, and the lower blade holder 72 are stacked in this order from above. The upper blade holder 71 and the lower blade holder 72 are connected via the guide spacer 73 by inserting the screw 74 from the side and tightening the nut 75 on the upper side, and between the upper blade holder 71 and the lower blade holder 72. The upper blade 51 and the lower blade 61 are arranged to be movable in the front-rear direction. For this reason, the distance between the upper blade holder 71 and the lower blade holder 72 defined by the guide spacer 73 is set slightly larger than the total thickness of the upper blade 51 and the lower blade 61. The rear portion of the lower blade holder 72 is fixed to the bottom surface of the housing 11.

上述の構成において、トリガスイッチ12のオン操作により駆動源が駆動すると、上ブレード51と下ブレード61が互いに180度の位相差で前後に往復運動を行うことで、切断刃52,62の間に進入した草木を切断することができる。   In the above configuration, when the driving source is driven by turning on the trigger switch 12, the upper blade 51 and the lower blade 61 reciprocate back and forth with a phase difference of 180 degrees between the cutting blades 52 and 62. You can cut the vegetation that has entered.

次に、図4を参照図に加えて、本発明の第一の実施形態に係るヘッジトリマの切断刃53,63について詳細に説明する。   Next, in addition to the reference diagram of FIG. 4, the cutting blades 53 and 63 of the hedge trimmer according to the first embodiment of the present invention will be described in detail.

本発明の第一の実施形態に係るヘッジトリマの切断刃53,63の刃先部53a,63aには、摺動面53c,63cに対するすくい面53b,63bの角度である刃先角が、刃元から刃末に向かって連続的に小さくなるようにすくい面53b,63bが形成されている。そして、刃元側の刃先角は従来の切断刃の刃先角(45度程度)より大きく、刃末側の刃先角は従来の切断刃の刃先角(45度程度)より小さくなるように設定されている。すなわち、刃元側と刃末側の中間位置で従来の切断刃の刃先角と同じ角度の箇所が存在することになる。本実施形態においては、刃元側である断面B1−B1で示す位置の刃先角β1は56度であり、刃末側である断面A1−A1で示す位置の刃先角α1は40度となっている。   The blade edge portions 53a and 63a of the cutting blades 53 and 63 of the hedge trimmer according to the first embodiment of the present invention have a blade edge angle which is an angle of the rake surfaces 53b and 63b with respect to the sliding surfaces 53c and 63c. The rake faces 53b and 63b are formed so as to be continuously reduced toward the end. The cutting edge angle on the cutting edge side is set to be larger than the cutting edge angle (about 45 degrees) of the conventional cutting edge, and the cutting edge angle on the cutting edge side is set to be smaller than the cutting edge angle (about 45 degrees) of the conventional cutting edge. ing. That is, there exists a portion having the same angle as the blade edge angle of the conventional cutting blade at an intermediate position between the blade base side and the blade end side. In the present embodiment, the blade edge angle β1 at the position indicated by the cross section B1-B1 on the blade base side is 56 degrees, and the blade edge angle α1 at the position indicated by the cross section A1-A1 on the blade end side is 40 degrees. Yes.

上述の構成の切断刃53,63で枝を切断する場合、切断位置である刃末側の刃先角が従来のものより小さいので、切断位置のすくい面53b,63bに働く切断抵抗により発生する切断刃53,63同士を押し付ける方向の分力が、従来の刃先角の場合と比較して小さくなる。これにより、切断刃53,63の切断位置より刃元側の摺接位置に負荷される接触圧が低減されるので、刃元側の刃先部の変形を防止することができる。また、刃元側の刃先角が従来のものより大きいので、刃元側の刃先部の剛性が従来の場合と比較して高くなり、刃元側の刃先部の変形をより防止することができる。   When cutting the branch with the cutting blades 53 and 63 having the above-described configuration, the cutting edge generated on the rake face 53b and 63b at the cutting position is generated because the edge angle at the cutting edge, which is the cutting position, is smaller than the conventional one. The component force in the direction in which the blades 53 and 63 are pressed to each other is smaller than in the case of the conventional blade edge angle. Thereby, since the contact pressure applied to the sliding contact position on the blade base side from the cutting position of the cutting blades 53 and 63 is reduced, it is possible to prevent the cutting edge portion on the blade base side from being deformed. In addition, since the blade edge angle on the blade base side is larger than the conventional one, the rigidity of the blade edge portion on the blade base side is higher than that in the conventional case, and deformation of the blade edge portion on the blade base side can be further prevented. .

また、上述の構成では、刃元から刃末に向かって刃先角が連続的に小さくなるように設定したことで、接触圧が最も大きくなる刃元に近づくにしたがって刃先角が大きくなるので、刃元側ほど刃先部の剛性が高くなり、より効果的に刃元側の刃先部の変形を防止することができる。   In the above-described configuration, since the edge angle is set so as to continuously decrease from the blade edge toward the blade edge, the edge angle increases as the edge approaches the edge where the contact pressure becomes maximum. The rigidity of the cutting edge portion becomes higher toward the original side, and deformation of the cutting edge portion on the cutting edge side can be more effectively prevented.

次に、本発明の第二の実施形態に係るヘッジトリマの切断刃について図5を参照して説明する。なお、第二の実施形態の構成は第一の実施形態と切断刃のみが異なるので、切断刃以外の構成については説明を省略する。   Next, the cutting blade of the hedge trimmer according to the second embodiment of the present invention will be described with reference to FIG. Since the configuration of the second embodiment is different from the first embodiment only in the cutting blade, the description of the configuration other than the cutting blade is omitted.

本発明の第二の実施形態に係るヘッジトリマの切断刃82,92の刃先部82a,92aには、摺動面82e,92eに対するすくい面82d、92dの角度である刃先角が、刃末側刃先部82b,92bは従来の切断刃の刃先角(45度程度)より小さく、刃元側刃先部82c,92cは従来の切断刃の刃先角(45度程度)より大きくなるようにすくい面82d、92dが形成されている。また、刃末側刃先部82b,92bと刃元側刃先部82c,92cは、その先端を連続させて形成されている。本実施形態においては、断面A2−A2で示す刃末側刃先部82b,92bの刃先角α2は40度であり、断面B2−B2で示す刃元側刃先部82c,92cの刃先角β2は63度となっている。   In the cutting edge portions 82a and 92a of the cutting blades 82 and 92 of the hedge trimmer according to the second embodiment of the present invention, the cutting edge angle that is the angle of the rake faces 82d and 92d with respect to the sliding surfaces 82e and 92e is the cutting edge side cutting edge. The portions 82b and 92b are smaller than the cutting edge angle (about 45 degrees) of the conventional cutting blade, and the cutting edge side 82c and 92c are rake face 82d and larger than the cutting edge angle (about 45 degrees) of the conventional cutting blade. 92d is formed. The blade end side blade edge portions 82b and 92b and the blade edge side blade edge portions 82c and 92c are formed such that their tips are continuous. In this embodiment, the cutting edge angle α2 of the cutting edge side cutting edge portions 82b and 92b shown by the cross section A2-A2 is 40 degrees, and the cutting edge angle β2 of the cutting edge side cutting edge portions 82c and 92c shown by the cross section B2-B2 is 63. It is a degree.

上述の構成の切断刃82,92で枝を切断する場合、切断位置である刃末側刃先部82b,92bの刃先角が従来のものより小さいので、切断位置のすくい面82d、92dに働く切断抵抗により発生する切断刃82,92同士を押し付ける方向の分力が、従来の刃先角の場合と比較して小さくなる。これにより、切断刃82,92の切断位置より刃元側の摺接位置に負荷される接触圧が低減されるので、刃元側の刃先部の変形を防止することができる。さらに、刃元側刃先部82c,92cの刃先角が従来のものより大きいので、刃元側刃先部82c,92cの剛性が従来の場合と比較して高くなり、刃元側刃先部82c,92cの変形をより防止することができる。   When cutting a branch with the cutting blades 82 and 92 having the above-described configuration, the cutting edge angle of the cutting edge side cutting edge portions 82b and 92b, which is the cutting position, is smaller than the conventional one, so that the cutting works on the rake faces 82d and 92d at the cutting position. The component force in the direction in which the cutting blades 82 and 92 are pressed against each other is reduced as compared with the conventional cutting edge angle. Thereby, since the contact pressure applied to the sliding contact position on the blade base side from the cutting position of the cutting blades 82 and 92 is reduced, deformation of the blade edge part on the blade base side can be prevented. Furthermore, since the blade edge angles of the blade base side blade edge portions 82c and 92c are larger than the conventional ones, the rigidity of the blade base side blade edge portions 82c and 92c is higher than the conventional case, and the blade base side blade edge portions 82c and 92c. Can be further prevented.

次に、本発明の第三の実施形態に係るヘッジトリマの切断刃について図6を参照して説明する。なお、第三の実施形態の構成は第一の実施形態と切断刃のみが異なるので、切断刃以外の構成については説明を省略する。   Next, a cutting blade of a hedge trimmer according to a third embodiment of the present invention will be described with reference to FIG. Since the configuration of the third embodiment is different from the first embodiment only in the cutting blade, the description of the configuration other than the cutting blade is omitted.

本発明の第三の実施形態に係るヘッジトリマの切断刃83,93の刃先部83a,93aには、摺動面83f,93fに対するすくい面83e,93eの角度である刃先角が、刃末側刃先部83b,93bは従来の切断刃の刃先角(45度程度)より小さく、刃元側刃先部83c,93は従来の切断刃の刃先角(45度程度)より大きくなるようにすくい面83e,93eが形成されている。また、刃末側刃先部83b,93bの先端は、刃元側刃先部83c,93cの先端の延長線に対して内側にオフセットしており、先端同士はR部83d,93dを介して接続されている。本実施形態においては、断面A3−A3で示す刃末側刃先部83b,93bの刃先角α3は40度であり、断面B3−B3で示す刃元側刃先部83c,93cの刃先角β3は63度となっている。   The blade edge portions 83a and 93a of the cutting blades 83 and 93 of the hedge trimmer according to the third embodiment of the present invention have a blade edge angle that is an angle of the rake surfaces 83e and 93e with respect to the sliding surfaces 83f and 93f. The portions 83b and 93b are smaller than the cutting edge angle (about 45 degrees) of the conventional cutting blade, and the cutting edge 83c and 93 are rake faces 83e, 83 so as to be larger than the cutting edge angle (about 45 degrees) of the conventional cutting blade. 93e is formed. Further, the tips of the blade end side blade tips 83b, 93b are offset inward with respect to the extension line of the tips of the blade base blade tips 83c, 93c, and the tips are connected to each other via R portions 83d, 93d. ing. In the present embodiment, the cutting edge angle α3 of the cutting edge side cutting edge portions 83b and 93b shown by the cross section A3-A3 is 40 degrees, and the cutting edge angle β3 of the cutting edge side cutting edge portions 83c and 93c shown by the cross section B3-B3 is 63. It is a degree.

上述の構成の切断刃83,93で枝を切断する場合、切断位置である刃末側刃先部83b,93bの刃先角が従来のものより小さいので、切断位置のすくい面83e,93eに働く切断抵抗により発生する切断刃83,93同士を押し付ける方向の分力が、従来の刃先角の場合と比較して小さくなる。これにより、切断刃83,93の切断位置より刃元側の摺接位置に負荷される接触圧が低減されるので、刃元側の刃先部の変形を防止することができる。また、刃元側刃先部83c,93cの刃先角が従来のものより大きいので、刃元側刃先部83c,93cの剛性が従来の場合と比較して高くなり、刃元側刃先部83c,93cの変形をより防止することができる。さらに、刃末側刃先部83b,93bの先端と刃元側刃先部83c,93cの先端とを不連続としたので、連続する形状と比較して加工精度を低くでき、製造が容易となる。   When cutting branches with the cutting blades 83 and 93 having the above-described configuration, the cutting edge angle of the cutting edge side cutting edge portions 83b and 93b, which is the cutting position, is smaller than that of the conventional one, so that the cutting works on the rake faces 83e and 93e at the cutting position The component force in the direction in which the cutting blades 83, 93 are pressed against each other is reduced compared to the conventional cutting edge angle. Thereby, since the contact pressure applied to the sliding contact position on the blade base side from the cutting position of the cutting blades 83 and 93 is reduced, it is possible to prevent the cutting edge portion on the blade base side from being deformed. Moreover, since the blade edge angle of the blade base side blade edge portions 83c and 93c is larger than the conventional one, the rigidity of the blade base side blade edge portions 83c and 93c is higher than that in the conventional case, and the blade base side blade edge portions 83c and 93c. Can be further prevented. Furthermore, since the tips of the blade end side cutting edge portions 83b and 93b and the tips of the blade base side cutting edge portions 83c and 93c are discontinuous, the machining accuracy can be lowered compared to the continuous shape, and the manufacture becomes easy.

次に、本発明の第四の実施形態に係るヘッジトリマの切断刃について図7を参照して説明する。なお、第四の実施形態の構成は第一の実施形態と切断刃のみが異なるので、切断刃以外の構成については説明を省略する。   Next, a cutting blade of a hedge trimmer according to a fourth embodiment of the present invention will be described with reference to FIG. Since the configuration of the fourth embodiment is different from the first embodiment only in the cutting blade, the description of the configuration other than the cutting blade is omitted.

本発明の第四の実施形態に係るヘッジトリマの切断刃84,94の刃先部84a,94aには、摺動面84e,94eに対するすくい面84d,94dの角度である刃先角が、刃末側刃先部84b,94bは従来の切断刃の刃先角(45度程度)より小さく、刃元側刃先部84c,94cは従来の切断刃の刃先角(45度程度)より大きくなるようにすくい面84d,94dが形成されている。また、刃末側刃先部84b,94bの先端は、刃元側刃先部84c,94cの先端の延長線に対して内側に傾斜している。本実施形態においては、断面A4−A4で示す刃末側刃先部84b,94bの刃先角α4は40度であり、断面B4−B4で示す刃元側刃先部84c,94cの刃先角β4は62度となっている。   In the blade tips 84a and 94a of the cutting blades 84 and 94 of the hedge trimmer according to the fourth embodiment of the present invention, the blade edge angle that is the angle of the rake surfaces 84d and 94d with respect to the sliding surfaces 84e and 94e is the blade edge side blade edge. The portions 84b and 94b are smaller than the cutting edge angle (about 45 degrees) of the conventional cutting blade, and the cutting edge side 84c and 94c are rake face 84d and larger than the cutting edge angle (about 45 degrees) of the conventional cutting blade. 94d is formed. Further, the tips of the blade end side blade edge portions 84b and 94b are inclined inward with respect to the extension line of the tip of the blade edge side blade edge portions 84c and 94c. In this embodiment, the blade edge angle α4 of the blade end side blade edge portions 84b and 94b shown by the cross section A4-A4 is 40 degrees, and the blade edge angle β4 of the blade edge side blade edge portions 84c and 94c shown by the cross section B4-B4 is 62. It is a degree.

上述の構成の切断刃84,94で枝を切断する場合、切断位置である刃末側刃先部84b,94bの刃先角が従来のものより小さいので、切断位置のすくい面84d,94dに働く切断抵抗により発生する切断刃84,94同士を押し付ける方向の分力が、従来の刃先角の場合と比較して小さくなる。これにより、切断刃84,94の切断位置より刃元側の摺接位置に負荷される接触圧が低減されるので、刃元側の刃先部の変形を防止することができる。また、刃元側刃先部84c,94cの刃先角が従来のものより大きいので、刃元側刃先部84c,94cの剛性が従来の場合と比較して高くなり、刃元側刃先部84c,94cの変形をより防止することができる。さらに、刃末側刃先部84b,94bの先端と刃元側刃先部84c,94cの先端とを不連続としたので、連続する形状と比較して加工精度を低くでき、製造が容易となる。   When the branch is cut with the cutting blades 84 and 94 having the above-described configuration, the cutting edge angle of the cutting edge side cutting edge portions 84b and 94b, which is the cutting position, is smaller than the conventional one, so that the cutting works on the rake surfaces 84d and 94d at the cutting position The component force in the direction of pressing the cutting blades 84 and 94 generated by the resistance is smaller than that in the case of the conventional cutting edge angle. Thereby, since the contact pressure applied to the sliding contact position on the blade base side from the cutting position of the cutting blades 84 and 94 is reduced, it is possible to prevent the cutting edge portion on the blade base side from being deformed. Moreover, since the blade edge angle of the blade base side blade edge portions 84c and 94c is larger than the conventional one, the rigidity of the blade base side blade edge portions 84c and 94c is higher than the conventional case, and the blade edge side blade edge portions 84c and 94c. Can be further prevented. Furthermore, since the tips of the blade end side blade tips 84b and 94b and the tips of the blade tip blade tips 84c and 94c are discontinuous, the machining accuracy can be lowered compared to the continuous shape, and the manufacture is facilitated.

次に、本発明の第五の実施形態に係るヘッジトリマの切断刃について図8を参照して説明する。なお、第五の実施形態の構成は第一の実施形態と切断刃のみが異なるので、切断刃以外の構成については説明を省略する。   Next, a hedge trimmer cutting blade according to a fifth embodiment of the present invention will be described with reference to FIG. Since the configuration of the fifth embodiment is different from the first embodiment only in the cutting blade, the description of the configuration other than the cutting blade is omitted.

本発明の第五の実施形態に係るヘッジトリマの切断刃85,95の刃先部85a,95aは、図8中に符号α5で示す摺動面85c,95cに対するすくい面85b,95bの角度である刃先角が刃先から刃元において一定に設定されている。なお、本実施形態においては、刃先角α5は45度に設定されている。また、切断刃85,95は、符号Tで示す摺動面85c,95cと刃元側外面85d,95dの距離である刃元側厚さに対し、符号Sで示す摺動面85c,95cと刃末側外面85e,95eの距離である刃末側厚さが薄くなるように刃元側外面85d,95dと刃末側外面85e,95eとがオフセットした平面上に形成されている。刃元側外面85d,95dと刃末側外面85e,95eとの接続部は応力集中を避けるためR面85f、95fで接続されている。また、刃元側外面85d,95dは長尺部と連続した平面となっている。なお、刃末側厚さSは、本実施形態においては一定としているが、刃末から刃元方向に向かって連続的に厚くなるように刃末側外面を傾斜面として形成しても良い。この場合、R面の形成を不要とすることができる。   The cutting edge portions 85a and 95a of the cutting blades 85 and 95 of the hedge trimmer according to the fifth embodiment of the present invention are cutting edges having an angle of the rake surfaces 85b and 95b with respect to the sliding surfaces 85c and 95c indicated by reference numeral α5 in FIG. The corner is set constant from the cutting edge to the cutting edge. In the present embodiment, the blade edge angle α5 is set to 45 degrees. Further, the cutting blades 85 and 95 have sliding surfaces 85c and 95c indicated by reference sign S with respect to the blade base side thickness which is the distance between the sliding faces 85c and 95c indicated by reference sign T and the blade base side outer faces 85d and 95d. The blade base side outer surfaces 85d and 95d and the blade end side outer surfaces 85e and 95e are formed on a plane that is offset so that the blade end side thickness, which is the distance between the blade end side outer surfaces 85e and 95e, is reduced. The connecting portions of the blade base side outer surfaces 85d and 95d and the blade end outer surfaces 85e and 95e are connected by R surfaces 85f and 95f in order to avoid stress concentration. Further, the blade base side outer surfaces 85d and 95d are flat surfaces that are continuous with the long portion. Although the blade end side thickness S is constant in the present embodiment, the blade end side outer surface may be formed as an inclined surface so as to be continuously thicker from the blade end toward the blade base direction. In this case, formation of the R surface can be eliminated.

上述の構成の切断刃85,95で枝を切断する場合、切断位置である刃末側の切断刃の厚さを薄く設定したことで、刃末側の切断刃のすくい面が狭く形成されているので、刃末側のすくい面に働く切断抵抗自体が小さくなり、それに比例して切断刃85,95同士を押し付ける方向の分力も小さくなる。これにより、切断刃85,95の切断位置より刃元側の摺接位置に負荷される接触圧が低減されるので、刃元側の刃先部の変形を防止することができる。また、刃先角は一定となっているので、ブレードの製造が容易になるとともに、刃先磨耗時の再研磨も容易となる。   When cutting the branches with the cutting blades 85 and 95 having the above-described configuration, the rake face of the cutting blade on the blade end side is formed narrow by setting the thickness of the cutting blade on the blade end side that is the cutting position thin. Therefore, the cutting resistance itself acting on the rake face on the blade end side is reduced, and the component force in the direction of pressing the cutting blades 85 and 95 is also reduced in proportion thereto. Thereby, since the contact pressure applied to the sliding contact position on the blade base side from the cutting position of the cutting blades 85 and 95 is reduced, it is possible to prevent the cutting edge portion on the blade base side from being deformed. In addition, since the blade edge angle is constant, the manufacture of the blade is facilitated, and re-polishing when the blade edge is worn is facilitated.

次に、本発明の第六の実施形態に係るヘッジトリマの切断刃について図9を参照して説明する。なお、第六の実施形態の構成は第一の実施形態と切断刃のみが異なるので、切断刃以外の構成については説明を省略する。   Next, a cutting blade of a hedge trimmer according to a sixth embodiment of the present invention will be described with reference to FIG. Since the configuration of the sixth embodiment is different from the first embodiment only in the cutting blade, the description of the configuration other than the cutting blade is omitted.

本発明の第六の実施形態に係るヘッジトリマの切断刃86,96の刃先部86a,96aは、図9中に符号α6で示す摺動面86c,96cに対するすくい面86b,96bの角度である刃先角が刃先から刃元において一定に設定されている。なお、本実施形態においては、刃先角α6は45度に設定されている。切断刃86,96のすくい面86b,96bは、図9(b)で示す刃元側においては、摺動面86c,96cから外面86d,96dまでの間全面に形成されているのに対し、図9(c)で示す刃末側においては、符号Eで示す摺動面86c,96cから外面86d,96dの方向に向かう所定の範囲のみに形成されており、符号Eで示すすくい面86b,96bと外面86d,96dとの間は、符号θで示す刃先角α6より小さい角度で傾斜した逃がし面86e,96eが形成されている。   The cutting edge portions 86a and 96a of the cutting blades 86 and 96 of the hedge trimmer according to the sixth embodiment of the present invention are cutting edges having an angle of the rake surfaces 86b and 96b with respect to the sliding surfaces 86c and 96c indicated by reference numeral α6 in FIG. The corner is set constant from the cutting edge to the cutting edge. In the present embodiment, the blade edge angle α6 is set to 45 degrees. The rake surfaces 86b and 96b of the cutting blades 86 and 96 are formed on the entire surface from the sliding surfaces 86c and 96c to the outer surfaces 86d and 96d on the blade base side shown in FIG. On the blade end side shown in FIG. 9 (c), it is formed only in a predetermined range from the sliding surfaces 86c, 96c indicated by symbol E toward the outer surfaces 86d, 96d. Relief surfaces 86e and 96e inclined at an angle smaller than the blade edge angle α6 indicated by the symbol θ are formed between the 96b and the outer surfaces 86d and 96d.

上述の構成の切断刃86,96で枝を切断する場合、切断位置である刃末側の切断刃に刃先角α6より小さい角度で傾斜した逃がし面86e,96eを設けたことで、全面がすくい面86b,96bで形成された場合と比較して、切断位置に働く切断抵抗が小さくなり、それにより切断刃86,96同士を押し付ける方向の分力も小さくなる。これにより、切断刃86,96の切断位置より刃元側の摺接位置に負荷される接触圧が低減されるので、刃元側の刃先部の変形を防止することができる。また、刃先角は一定となっているので、ブレードの製造が容易になるとともに、刃先磨耗時の再研磨も容易となる。   When cutting the branches with the cutting blades 86 and 96 having the above-described configuration, the entire surface is scooped by providing the relief surfaces 86e and 96e inclined at an angle smaller than the blade edge angle α6 on the cutting blade on the blade end side that is the cutting position. Compared to the case where the surfaces 86b and 96b are formed, the cutting resistance acting on the cutting position is reduced, and thereby the component force in the direction in which the cutting blades 86 and 96 are pressed together is also reduced. Thereby, since the contact pressure applied to the sliding contact position on the blade base side from the cutting position of the cutting blades 86 and 96 is reduced, it is possible to prevent the cutting edge portion on the blade base side from being deformed. In addition, since the blade edge angle is constant, the manufacture of the blade is facilitated, and re-polishing when the blade edge is worn is facilitated.

以上、本発明の好適な実施形態について説明したが、本発明の技術的範囲は上記実施形態の技術的範囲に限定されるものではなく、本発明の要旨を逸脱しない限り種々なる形態に変更することが可能である。   The preferred embodiments of the present invention have been described above, but the technical scope of the present invention is not limited to the technical scope of the above-described embodiments, and various modifications can be made without departing from the gist of the present invention. It is possible.

例えば、上述の第二から第四の実施形態においては、切断刃の刃先角は、刃末から刃元に向かって2種類の刃先角で段階的に大きくしたが、3種類以上の刃先角で段階的に大きくしても良い。また、上述の実施形態においては、上ブレード51と下ブレード61の両方が往復運動を行う構成としたが、いずれが一方のブレードのみが往復運動を行う構成としても良い。   For example, in the second to fourth embodiments described above, the cutting edge angle of the cutting blade is increased stepwise from the blade edge toward the cutting edge with two types of cutting edge angles, but with three or more types of cutting edge angles. You may enlarge in steps. In the above-described embodiment, both the upper blade 51 and the lower blade 61 are configured to reciprocate. However, any one of the blades may be configured to reciprocate.

また、上述の第五および第六の実施形態においては、切断刃の刃先角は刃先から刃元において一定に設定されていたが、上述の第一から第四の実施形態で説明した刃元側の刃先角に対して刃末側の刃先角を小さく設定された切断刃において、さらに第五および第六の実施形態で説明した構成を実施することで、極めて有効に刃元側の刃先部の変形を防止することができる。   Further, in the fifth and sixth embodiments described above, the cutting edge angle of the cutting blade is set to be constant from the cutting edge to the cutting edge, but the cutting edge side described in the first to fourth embodiments described above. In the cutting blade in which the blade edge angle on the blade edge side is set smaller than the blade edge angle, the configuration described in the fifth and sixth embodiments is further performed, so that the blade edge portion on the blade base side is extremely effectively Deformation can be prevented.

10 ハウジング、11 メインハンドル、12 トリガスイッチ、21 補助ハンドル、22 ガード板、50 刈刃部、51 上ブレード、52 長尺部、53 切断刃、53a 刃先部、53b すくい面、53c 摺動面、54 長孔、61 下ブレード、62 長尺部、63 切断刃、63a 刃先部、63b すくい面、63c 摺動面、64 長孔、71 上ブレードホルダ、72 下ブレードホルダ、73 ガイドスペーサ、74 ネジ、75 ナット、82 切断刃、82a 刃先部、82b 刃末側刃先部、82c 刃元側刃先部、82d すくい面、82e 摺動面、83 切断刃、83a 刃先部、83b 刃末側刃先部、83c 刃元側刃先部、83d R部、83e すくい面、83f 摺動面、84 切断刃、84a 刃先部、84b 刃末側刃先部、84c 刃元側刃先部、84d すくい面、84e 摺動面、85 切断刃、85a 刃先部、85b すくい面、85c 摺動面、85d 刃元側外面、85e 刃末側外面、85f R面、86 切断刃、86a 刃先部、86b すくい面、86c 摺動面、86d 外面、86e 逃がし面、92 切断刃、92a 刃先部、92b 刃末側刃先部、92c 刃元側刃先部、92d すくい面、92e 摺動面、93 切断刃、93a 刃先部、93b 刃末側刃先部、93c 刃元側刃先部、93d R部、93e すくい面、93f 摺動面、94 切断刃、94a 刃先部、94b 刃末側刃先部、94c 刃元側刃先部、94d すくい面、94e 摺動面、95 切断刃、95a 刃先部、95b すくい面、95c 摺動面、95d 刃元側外面、95e 刃末側外面、95f R面、96 切断刃、96a 刃先部、96b すくい面、96c 摺動面、96d 外面、96e 逃がし面   DESCRIPTION OF SYMBOLS 10 Housing, 11 Main handle, 12 Trigger switch, 21 Auxiliary handle, 22 Guard plate, 50 Cutting blade part, 51 Upper blade, 52 Long part, 53 Cutting blade, 53a Cutting edge part, 53b Rake face, 53c Sliding face, 54 Long hole, 61 Lower blade, 62 Long part, 63 Cutting blade, 63a Cutting edge, 63b Rake face, 63c Sliding surface, 64 Long hole, 71 Upper blade holder, 72 Lower blade holder, 73 Guide spacer, 74 Screw 75 Nut, 82 Cutting blade, 82a Cutting edge, 82b Cutting edge side cutting edge, 82c Cutting edge side cutting edge, 82d Rake face, 82e Sliding surface, 83 Cutting blade, 83a Cutting edge, 83b Cutting edge side cutting edge, 83c Cutting edge side cutting edge, 83d R section, 83e Rake face, 83f Sliding face, 84 Cutting blade, 84a Cutting edge, 84b Blade Edge side edge part, 84c Edge side edge part, 84d Rake face, 84e Sliding face, 85 Cutting blade, 85a Edge edge part, 85b Rake face, 85c Sliding face, 85d Edge side outer face, 85e Edge side outer face, 85f R surface, 86 cutting blade, 86a cutting edge, 86b rake surface, 86c sliding surface, 86d outer surface, 86e relief surface, 92 cutting blade, 92a cutting edge portion, 92b cutting edge side cutting edge portion, 92c cutting edge side cutting edge portion, 92d rake face, 92e sliding face, 93 cutting edge, 93a cutting edge, 93b blade end side cutting edge, 93c cutting edge side cutting edge, 93d R section, 93e rake face, 93f sliding face, 94 cutting edge, 94a cutting edge 94b Cutting edge side, 94c Cutting edge side, 94d Rake face, 94e Sliding face, 95 Cutting edge, 95a Cutting edge, 95b Rake face, 95c Sliding face, 95d Stage-side outer surface, 95e blade end side outer surface, 95f R surface, 96 the cutting blade, 96a cutting edge, 96b rake face, 96c sliding surface, 96d outer surface, 96e relief surface

Claims (7)

長尺部の側方に複数の切断刃が列設された上下一対のブレードが摺接状態を保ちながら往復運動して草木の切断を行う刈込み機において、
前記切断刃の刃先部には、切断時の切断抵抗により発生する切断刃同士を押し付ける方向の分力が刃元側に対して刃末側が小さくなるようにすくい面が形成されていることを特徴とする刈込み機。
In a trimming machine that cuts vegetation by reciprocating while a pair of upper and lower blades in which a plurality of cutting blades are arranged in a row on the side of the long part while maintaining a sliding contact state,
The cutting edge of the cutting blade is formed with a rake face so that the component force in the direction of pressing the cutting blades generated by cutting resistance at the time of cutting is smaller on the blade end side than on the blade base side. And a trimming machine.
前記切断刃の刃先部には、刃元側の刃先角に対して刃末側の刃先角が小さくなるように前記すくい面が形成されていることを特徴とする請求項1記載の刈込み機。   2. The trimming machine according to claim 1, wherein the rake face is formed at a cutting edge portion of the cutting blade such that a cutting edge angle on a cutting edge side is smaller than a cutting edge angle on a cutting edge side. 前記刃先角は、前記切断刃の刃元から刃末に向かって段階的に小さく設定されていることを特徴とする請求項2記載の刈込み機。   The trimming machine according to claim 2, wherein the cutting edge angle is set to be smaller stepwise from a cutting edge of the cutting blade toward a cutting edge. 前記刃先角は、前記切断刃の刃元から刃末に向かって連続的に小さく設定されていることを特徴とする請求項2記載の刈込み機。   3. The trimming machine according to claim 2, wherein the cutting edge angle is set to be continuously small from the cutting edge of the cutting blade toward the cutting edge. 前記切断刃の刃先部には、刃元側のすくい面に対して刃末側のすくい面が狭くなるように前記すくい面が形成されていることを特徴とする請求項1記載の刈込み機。   2. The trimming machine according to claim 1, wherein the rake face is formed on a cutting edge portion of the cutting blade such that a rake face on the blade end side is narrower than a rake face on the blade base side. 前記切断刃は、刃元側の厚さに対して刃末側の厚さが薄く設定されていることを特徴とする請求項5記載の刈込み機。   6. The trimming machine according to claim 5, wherein the cutting blade is set such that the thickness on the blade end side is thinner than the thickness on the blade base side. 前記切断刃には、刃末側のすくい面に接続する逃がし面が形成されていることを特徴とする請求項5記載の刈込み機。   6. A trimming machine according to claim 5, wherein said cutting blade is formed with a relief surface connected to a rake surface on the blade end side.
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JP2017086005A (en) * 2015-11-12 2017-05-25 株式会社マキタ Blade assembly and hedge trimmer using the same
CN111054939A (en) * 2019-12-25 2020-04-24 陕西理工大学 Combined double-tool bit turning tool

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JP2023077677A (en) * 2021-11-25 2023-06-06 株式会社源平刃物工場 Clipper blade and clipper type cutting blade device

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JPS5548319A (en) * 1978-09-30 1980-04-07 Matsushita Electric Works Ltd Trimming knife of clipper for garden tree
JPS5686971U (en) * 1979-12-07 1981-07-11
JPS6131040U (en) * 1984-07-31 1986-02-25 邦範 新井 hedge pruning machine
JPS62172339U (en) * 1986-04-24 1987-10-31
DE4020114A1 (en) * 1990-06-23 1992-01-09 Busatis Werke Kg Double cutter with contrary rotating reciprocating action - comprises two sets of differently formed blades and one set cuts straw and other trims hedges
JP3074834B2 (en) * 1991-09-17 2000-08-07 日本電気株式会社 Silicon heterojunction bipolar transistor

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JPS5548319A (en) * 1978-09-30 1980-04-07 Matsushita Electric Works Ltd Trimming knife of clipper for garden tree
JPS5686971U (en) * 1979-12-07 1981-07-11
JPS6131040U (en) * 1984-07-31 1986-02-25 邦範 新井 hedge pruning machine
JPS62172339U (en) * 1986-04-24 1987-10-31
DE4020114A1 (en) * 1990-06-23 1992-01-09 Busatis Werke Kg Double cutter with contrary rotating reciprocating action - comprises two sets of differently formed blades and one set cuts straw and other trims hedges
JP3074834B2 (en) * 1991-09-17 2000-08-07 日本電気株式会社 Silicon heterojunction bipolar transistor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017086005A (en) * 2015-11-12 2017-05-25 株式会社マキタ Blade assembly and hedge trimmer using the same
CN111054939A (en) * 2019-12-25 2020-04-24 陕西理工大学 Combined double-tool bit turning tool

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