201026221 六、發明說明： 【發明所屬之技術領域】 本發明係關於用於籬笆修整之籬笆修剪器，. 、β於萆坪 修剪之草坪修剪器等的園藝用修剪器。 【先前技術】 在專利文獻1中，揭示一種園藝用修剪器。該園藝用修 剪器具備有一對剪切刀片、藉由旋轉而使一對剪切刀片往 復運動之曲軸構件、及使曲軸構件旋轉之驅動機構。在各 個剪切刀片上形成有配設曲轴構件之嵌合孔在曲軸構件 上設置有與一對剪切刀片之嵌合孔分別嵌合之—對偏心巧 輪。在各個剪切刀片上沿著往復運動方向設置有複數之刀 刃’藉由一對剪切刀片往復運動而切斷草木。如專利文獻 1之所揭示，已知園藝用修剪器係以滑動一對剪切刀片的 方式使其往復運動者，或以擺動一對剪切刀片的方式使立 往復運動者等。 〃201026221 VI. Description of the Invention: [Technical Field] The present invention relates to a garden trimmer for a fence trimmer for a fence trimming, a beta lawn trimmer for a trimming lawn, and the like. [Prior Art] In Patent Document 1, a gardening trimmer is disclosed. The gardening trimmer includes a pair of shearing blades, a crank member that reciprocates a pair of shearing blades by rotation, and a driving mechanism that rotates the crankshaft members. A fitting hole in which a crank member is disposed is formed on each of the shearing blades, and a pair of eccentric wheels fitted to the fitting holes of the pair of shearing blades are provided on the crank member. A plurality of blades are provided on each of the shearing blades in the direction of reciprocation, and the vegetation is cut by reciprocating a pair of shearing blades. As disclosed in Patent Document 1, it is known that a gardening trimmer reciprocates a person by reciprocating a pair of shearing blades or by swinging a pair of shearing blades. 〃
在園藝用修剪器中，會有#切刀 fa」刀刀片之嵌合孔自偏心凸輪 脫離’而使剪切刀片無法動作的情況。心，專利文獻ι 之園藝用《器乃採用在一對偏心凸輪之間設置有中間刀 片之曲軸構件，或在各個偏心凸輪之外周面設置有凸緣之 曲軸構件。根據此類曲軸構 千田僻叶 J防止剪切刀片或偏心凸 輪之偏磨耗，從而可防止酋士刀ΰ 丨万止哥切刀片之嵌合孔從偏心凸輪脫 離。 [專利文獻1]曰本特開平09_172866號公 【發明内容】 7 Α 143293.doc 201026221 [發明所欲解決之問題] 在專利文獻1所揭示之曲軸構件中，偏心凸輪之凸緣或 中間刀片僅設置於相對於剪切刀片之厚度方向之其中一 側。因此，例如切斷粗大的樹枝時，在剪切刀片被施加強 大的外力之情況下，剪切刀片之嵌合孔有時會從偏心凸輪 脫離。 本發明可解決上述之問題。本發明係提供一種可確實防 止剪切刀片之嵌合孔自偏心凸輪脫離之園藝用修剪器。 [解決問題之手段] 根據本發明所具體化之園藝用修剪器，其具備一對剪切 刀片、藉由旋轉而使一對剪切刀片往復運動之曲軸構件、 及使曲軸構件旋轉之驅動機構。在各個剪切刀片上形成有 配設曲轴構件之嵌合孔。曲轴構件包含有與一對剪切刀片 之鼓合孔分別嵌合之-對偏心凸輪，及設置於偏心凸輪之 間之中間刀片。且，在至少—者偏心凸輪上，形成有^爽 剪切刀片並與中間刀片對向之凸緣。 在該園藝用修剪器中，藉由中間刀片及與其對向之偏心 凸輪之凸、緣，將剪切刀片自板厚方向之兩側灸持。根據該 構造，即使在對剪切刀片施加強大的外力之情況下，亦可 確實防止剪切刀片之嵌合孔從偏心凸輪脫離。 上述之凸緣以遍及偏心凸輪之全周而形成為佳。 根據該構造，不論曲軸構件之旋轉位置為何，在剪切刀 片與偏心凸輪處於抵接之位置下，剪切刀片均始終藉二 心凸輪之凸緣與中間刀片而被夾持。藉此，即使在對勢切 143293.doc 201026221 刀片施加強大的外力之情況下’亦可防止剪切刀月之嵌合 孔自偏心凸輪脫離。又，相較於僅在外周面之一部分形成 凸緣，遍及全周而形成凸緣偏心凸輪之形狀較簡單故製造 較容易。 上述之曲軸構件中，在與其旋轉位置偏離之位置設置至 二佳。該情況下’各個銷之一端之部分連接於驅 動機構為佳。且，各個鎖之另一端之部分具有將—對偏心 凸輪及配置於其間之中間刀片相互鎖固之螺釘部為佳。 在。構每巾係以共通之構件實現自驅動機構至曲 件之扭力傳遞，及-對偏心凸輪與中間刀片之鎖固。藉 2，可料軸構件之結構簡單化。又，將_對偏心 中=片利用螺釘部鎖固之構造’相較於利用焊接或鍛造 =之構造更容易組裝，且生產性或維修性高，亦可抑 市!j成本。 上述之令間刀片具有以曲軸構件之旋轉轴為中心之圓板 =起該情況下，其中間刀片之半徑，係自曲軸構件 於：、、凸凸輪之中心軸止之偏移距離、加上形成 於偏〜凸輪之凸緣之半徑而得之尺寸以上為佳。 j將中間刀片採用簡單之圓板形狀，可將曲軸構件之構 時，中間刀片之半徑若為滿足上述之關係之 二其::：片將確實與形成於偏心凸輪之凸緣之整體 ’抵接於偏心凸輪之剪切刀片便會藉由偏 心凸輪之凸緣與中間刀片而確實被夾持。 本發明亦可具體化為可拆裝地安裝於園藝用修剪器之刀 143293.doc 201026221 片組。該刀片組具襟一對煎切刀片、及藉由園藝用修剪写 之驅動機構而旋轉，並藉由旋轉使一對剪切刀片往復運動 之曲軸構件。在各個剪切刀片上形成有配設曲轴構件之歲 2孔。曲軸構件包含與一對剪切刀片之嵌合孔分別扣合之 一對偏心凸輪，及設置於偏心凸輪之 在至少-者偏心凸輪上，形成有包爽剪切刀二 片對向之凸緣。 根據該刀片組’即使在對剪切刀片施加強大的外力之情 況:，亦可確實防止煎切刀片之嵌合孔從偏心凸輪脫離。月 在上述之刀片組巾，曲㈣件宜為不論相對於—對煎切 刀片如何地相對移動及相對旋 脫離。 7小會從-對剪切刀片 在從園藝用修剪器卸下的狀態下之剪 構件可相對於一對剪切 、中曲軸 先前之刀片扭/ 地移動、旋轉。此時，在 僅r詈於前’ ’其構造係將偏心凸輪之凸緣或中間刀片 又切刀片之其中—者側，而曲軸構件可 切刀片脫離。因此’將刀片組安 Μ 轴構件有時會從刀片組脫落。與此相對曲 組中，由於其構造係由偏心凸产之本發明之刀片 切刀片，使曲"凸緣與中間刀片包夾剪 地進行對園藝用修剪器之安裝作業。刀片脫離，故可簡單 =據本發明之園藝用修剪器或刀片組 刀片之嵌合孔從偏心凸輪脫離。 ’防止剪切 【實施方式】 143293.doc 201026221 先歹J舉以下說明之實施例之主要的特徵。 (特徵1)剪切刀片伤产甘w J月係在其基端部設置有嵌合孔。 (寺枝）剪切刀片之嵌合孔具有有橢圓形狀。其橢圓形 &之長半讧方向相對於剪切刀片往復運動之方向為垂直。In the garden trimmer, there is a case where the fitting hole of the #cutting knife fa is detached from the eccentric cam and the shearing blade cannot be operated. For example, the horticultural device uses a crank member in which an intermediate blade is disposed between a pair of eccentric cams, or a crank member in which a flange is provided on a peripheral surface of each eccentric cam. According to this type of crankshaft structure, the slanting blade J prevents the partial wear of the shearing blade or the eccentric cam, thereby preventing the fitting hole of the emirate knife from being disengaged from the eccentric cam. [Patent Document 1] Japanese Unexamined Patent Publication No. Hei No. 09-172866. [Invention of the Invention] 7 143 143293.doc 201026221 [Problem to be Solved by the Invention] In the crank member disclosed in Patent Document 1, the flange of the eccentric cam or the intermediate blade is only It is disposed on one side of the thickness direction with respect to the shearing blade. Therefore, for example, when the thick branch is cut, the fitting hole of the shearing blade may be detached from the eccentric cam when a strong external force is applied to the shearing blade. The present invention can solve the above problems. SUMMARY OF THE INVENTION The present invention provides a garden trimmer that can surely prevent the fitting hole of the shearing blade from being detached from the eccentric cam. [Means for Solving the Problem] A garden trimmer according to the present invention includes a pair of shearing blades, a crank member that reciprocates a pair of shearing blades by rotation, and a driving mechanism that rotates the crank member . A fitting hole in which a crank member is disposed is formed on each of the shearing blades. The crank member includes a pair of eccentric cams respectively fitted to the pair of nip holes of the pair of shearing blades, and an intermediate blade disposed between the eccentric cams. Further, on at least the eccentric cam, a flange which is formed by the shear blade and opposed to the intermediate blade is formed. In the garden trimmer, the shearing blade is moxibusted from both sides in the thickness direction by the intermediate blade and the convex and rim of the eccentric cam opposed thereto. According to this configuration, even when a strong external force is applied to the shearing blade, the fitting hole of the shearing blade can be surely prevented from being detached from the eccentric cam. The flange described above is preferably formed over the entire circumference of the eccentric cam. According to this configuration, regardless of the rotational position of the crank member, the shearing blade is always held by the flange of the centering cam and the intermediate blade at the position where the shearing blade and the eccentric cam are in contact. Thereby, even in the case where a strong external force is applied to the blade of the cut surface 143293.doc 201026221, the fitting hole of the shearing knife can be prevented from being detached from the eccentric cam. Further, it is easier to manufacture than forming the flange only on one of the outer peripheral faces, and forming the flange eccentric cam over the entire circumference is simple. In the crank member described above, it is set to a position which is offset from the rotational position thereof. In this case, it is preferable that the portion of each of the pins is connected to the driving mechanism. Further, the other end portion of each of the locks preferably has a screw portion that locks the eccentric cam and the intermediate blade disposed therebetween. in. Each of the tissues is configured to realize the torque transmission from the driving mechanism to the curved piece by a common member, and to lock the eccentric cam and the intermediate blade. By means of 2, the structure of the shaft member can be simplified. Further, it is easier to assemble the structure in which the eccentric middle plate is locked by the screw portion than the structure using welding or forging, and the productivity and maintainability are high, and the cost can be suppressed. The above-mentioned inter-blade has a circular plate centered on the rotation axis of the crank member = in this case, the radius of the intermediate blade is offset from the crankshaft member at the center axis of the convex cam, plus It is preferable that it is formed in a radius of a flange of the offset-cam. j The intermediate blade adopts a simple circular plate shape, and when the crank member is constructed, if the radius of the intermediate blade satisfies the above relationship: the:: the piece will be exactly the same as the integral formed on the flange of the eccentric cam. The shearing blade attached to the eccentric cam is surely clamped by the flange of the eccentric cam and the intermediate blade. The present invention can also be embodied as a blade that can be detachably mounted to a garden trimmer 143293.doc 201026221. The blade set has a pair of frying blades, and a crank member that is rotated by a gardening trimming drive mechanism and reciprocates by rotating a pair of shearing blades. An old hole of a crankshaft member is formed on each of the shearing blades. The crank member includes a pair of eccentric cams respectively engaged with the pair of shearing holes of the pair of shearing blades, and a pair of eccentric cams disposed on the at least one of the eccentric cams, and the two opposing flanges of the wrapping shearing knife are formed . According to the blade group', even when a strong external force is applied to the shearing blade, it is possible to surely prevent the fitting hole of the frying blade from being detached from the eccentric cam. Month In the above-mentioned blade group, the curved piece (4) should be relatively movable and relatively detached relative to the blade. 7-small-slave-cutting blade The shearing member in the state of being removed from the gardening trimmer can be twisted/grounded and rotated relative to the pair of shearing, middle crankshafts. At this time, the structure of the eccentric cam or the intermediate blade cuts the blade side of the blade only when the front end is erected, and the crank member can be detached from the blade. Therefore, the blade assembly is sometimes detached from the blade set. In contrast to this, since the structure is eccentrically convexly produced by the razor blade of the present invention, the curved "flange and intermediate blade are clipped and trimmed to the garden trimmer. The blade is detached, so that it is simple = the fitting hole of the garden trimmer or the blade set blade according to the present invention is detached from the eccentric cam. </ RTI> Preventing Shearing [Embodiment] 143293.doc 201026221 The following is a description of the main features of the embodiments described below. (Feature 1) The shearing blade is wound with a fitting hole provided at the proximal end portion thereof. The fitting hole of the (Temple Branch) shearing blade has an elliptical shape. The direction of the long half of the ellipse & is perpendicular to the direction in which the shearing blade reciprocates.
(形態 3)使一#4- > n -fcA 对偏〜凸輪相對於曲軸構件之旋轉轴相互 朝相反方向而予以偏移°即’-對偏心凸輪以相互具180。 之相位差而偏心旋轉的方式而予以配置。 (死^態4)各個凸輪及φρ弓ημ曰^_印， φ 拘及宁間刀片具有圓板形狀。中間刀片 之半徑等於偏心凸輪之偏 梅I偏移距離加上形成於偏心凸輪之凸 緣之半徑之尺寸。 [實施例] 就實施本發明之實施例—面| 一 Λ 面參照设計圖一面加以說明。 圖1顯示本實施例之籬笆修酋 •"双器10之外觀。籬笆修剪器10 係主要用於籬笆之修整之動力工呈 m &動力工具，為園藝用修剪器之一 種。 • 如圖1所示，籬®修剪器10具備主體12、及安裝於主體 12之刀片組丨⑼。刀片組叫目對於主體12而被固定， 相對於主體拆裝。 ’ 刀片組100具備有一對剪切刀片11n ^ 力J刀月110、12〇及曲軸構件 . no。各個剪切刀片110、120被支捭兔- .叉符為可滑動，並以藉由 曲軸構件170之旋轉而往復運動的方 初幻万式構成。於各個剪 刀片U0、120上，沿著往復運動方向設置有複數 118、128(參照圖3)，且構成為藉由-對f切刀片110、12〇 相對性的往復運動而切斷枝葉。關於刀 143293.doc 201026221 在後段中將詳細地說明。 主體12具有外殼20。在外殼20上’為防止切斷碎片飛 政’设置有擋屑板14、供使用者握持之前把手μ及主把手 22。在刖把手16與主把手22上，設置有使籬笆修剪器丨〇啟 動之操作開關1 8、24。2個操作開關1 8、24在外殼20内藉 由連桿機構28而被連結。 在外殼20之内部，設置有馬達3〇、減速齒輪34及中心軸 36。中心軸36係將支持減速齒輪34及曲軸構件17〇支持為 可旋轉。減速齒輪34係構成為與馬達30之輸出轴32扣合， 並藉由馬達30而旋轉。減速齒輪34與曲軸構件17〇係以無 法相對旋轉之方式而連接，減速齒輪34與曲軸構件17〇係 成為一體而旋轉。即，來自馬達3〇之扭力會經由減速齒輪 34而傳遞至曲軸構件17〇。如此，馬達3〇、減速齒輪及 中心軸36構成使曲軸構件17〇旋轉之驅動機構。 刀片組100藉由複數之銷1〇1而在外殼2〇内決定其位置。 複數之銷101藉由外殼2〇之左右侧壁而被支持。外殼2〇可 左右刀解’藉由分解外殼2〇而可拆裝刀片組100，藉由組 裝外殼20而使刀片組100固定於外殼20。 圖2係放大顯示圖1之符號II所指之部分。圖3係顯示從 主體拆下之剪切刀片1〇〇。圖4係顯示將剪切刀片組分解後 之狀態。—面參照圖2、圖3、圖4—面就剪切刀片組之結 構加以詳細說明。 到切刀片組100主要具備一對剪切刀片u〇、12〇，將一 對’切刀片支持為可滑動之上側導板⑺2及下側導板i 〇4， 143293.doc 201026221 及曲軸構件170。 一對剪切刀片110、120係由上側剪切刀片u〇與下側剪 切刀片i2〇而構成。在上側剪切刀片110之基端部112形成 有嵌合孔114。嵌合孔114具有橢圓形狀，其長半徑相對於 上側剪切刀片110往復運動之方向垂直延伸。同樣的，在 下側剪切刀片120之基端部122 ’亦形成有嵌合孔124。礙 合孔124具有橢圓形狀，其長半徑相對於下側剪切刀片i2〇 往復運動之方向垂直延伸。 曲軸構件1 70係配設於一對剪切刀片丨丨〇、i 2〇之嵌合孔 114、124。曲軸構件170主要由上側偏心凸輪13()、下側偏 心凸輪140、中間刀片15〇、及2個銷構件16〇所構成。 上側偏心凸輪130、下侧偏心凸輪14〇、及中間刀片15〇 分別具有大致圓板形狀》上側偏心凸輪13〇與下側偏心凸 輪140具有相同直徑。另一方面/中間刀片15〇具有比上側 偏心凸輪130及下側偏心凸輪14〇為大之直徑， 上側偏心凸輪130配置於中間刀片15〇之上面，下側偏心 凸輪140配置於中間刀片15〇之下面。即，曲軸構件po具 有重合上側偏心凸輪13〇、中間刀片15〇、及下側偏心凸輪 140之三片圓板之三層構造。曲軸構件17〇形成有中心轴％ 所插通之旋轉中心孔176，且被支持為能以中心軸％為旋 轉軸而旋轉。 二個銷構件160在與旋轉中心孔176偏離之位置，自上側 偏心凸輪130之上面起與旋轉十心孔176平行延伸。二個銷 構件160係插入設置於減速齒輪之銷插入孔34&，以使曲軸 143293.doc 201026221 構件170與減速齒輪34無法相對旋轉而連接。關於銷構件 160之結構，將在後段作詳細地說明。 上側偏心凸輪130具有僅比上側剪切刀片11〇之嵌合孔 114之短半徑略小之直徑，且以些微之間隙嵌合於上側剪 刀刀片100之肷合孔114。如圖4所示，旋轉中心軸176形成 在相對於上側偏心凸輪13G之圓板形狀之中心軸有所偏離 之位置（偏移之位置）。因此，當曲轴構件170旋轉時，上側 偏心凸輪130係偏心旋轉。藉由上側偏心凸輪13〇之偏心旋 轉使上側剪切刀片110以相對於主體12而進退的方式（在 圖1、圖2之左右方向）往復運動。 下側偏心凸輪14〇具有比下側剪切刀片12〇之嵌合孔ad 之短半徑略小之直徑，i以些微之間隙嵌纟於下側剪切刀 片120之後合孔124。如圖4所示，旋轉中心轴176形成在相 對於下側偏心凸輪14〇之圓板形狀之中心軸有所偏離之位 置（所偏移之位置）。因此，當曲軸構件丨7〇旋轉時，下側偏 心凸輪140係偏心旋轉。藉由下側偏心凸輪14〇之偏心旋 轉，使下側剪切刀片120以相對於主體12而進退的方式（在 圖1、圖2之左右方向）往復運動。 此處，在上側偏心凸輪13〇與下側偏心凸輪14〇中將旋 轉中心孔m於相反方向予以偏移。藉此，上側偏心凸輪 "ο與下側偏心凸輪140會相互以18〇。之相位差而偏心旋 轉。其結果’上侧剪切刀片11G與下側剪切刀片12〇便會相 互以鮮之相位差往復運動。即，在上側煎切刀片ιι〇相 對於主體12前進之期間，下側剪切刀片⑵相對於主體12 143293.doc •10· 201026221 後退’而在上側剪切刀片110相對於主體12後退之期間， 下側剪切刀片12〇相對於主體12前進。 在上側偏心凸輪130之外周面，形成有凸緣134。凸緣 134位於上側偏心凸輪13〇之上端，遍及上側偏心凸輪13〇 之全周而形成。凸緣134之直徑比上側剪切刀片u〇之嵌合 孔114之短半徑為大，凸緣134之一部分伸出於上側剪切刀 片110之基端部112之上方。藉由在上側剪切刀片ι1〇之基 端部112之上方存在凸緣134，使上側剪切刀片110之基端 部Π2被禁止於上方移動’從而可防止嵌合孔1丨4從上侧偏 心凸輪130脫離。 同樣的’在下侧偏心凸輪140之外周面，亦形成有凸緣 144。凸緣144位於下側偏心凸輪140之下端，遍及下側偏 心凸輪140之全周而形成。凸緣144之直徑比下側剪切刀片 120之嵌合孔124之短半徑為大，凸緣144之一部分伸出於 下側剪切刀片120之基端部IK之下方。藉由在下側剪切刀 片120之基端部122之上方存在凸緣144，使下側勢切刀片 120之基端部122被禁止於下方移動，從而可防止嵌合孔 124從下側偏心凸輪14〇脫離。 中間刀片150比上側偏心凸輪130及下側偏心凸輪14〇為 大，並介於上侧剪切刀片11 〇之基端部丨i 2與下側剪切刀片 120之基端部122之間。藉由在上側剪切刀片11 〇之基端部 112之下方存在中間刀片15 0，使上側剪切刀片11 〇之基端 部112被禁止於下方移動，從而可防止上側剪切刀片11〇之 嵌合孔114從上側偏心凸輪130脫離《又，藉由在下侧剪切 143293.doc -11 - 201026221 刀片120之基端部122之上方存在中間刀片150，在下側剪 切刀片120之基端部122之上方移動被禁止，從而可防止下 侧剪切刀片120之嵌合孔124從上側偏心凸輪140脫離。 如上所述’在本實施例之刀片組100中，於一對偏心凸 輪130、140之間設有中間刀片150上，再者，在各個偏心 凸輪130、140,形成有包夾剪切刀片11〇、12〇並與中間刀 片150對向之凸緣134、144。根據該構造，使奠切刀片 110、120之基端部112、122藉由中間刀片150及與其對向 之偏心凸輪130、140之凸緣134、144,從板厚方向之兩側 Q 予以保持。根據該構造，即使在對剪切刀片1 1 〇、i 施加 強大的外力之情況下，亦可確實地防止剪切刀片丨10、120 之嵌合孔114、124從偏心凸輪130、140脫落。 在從主體卸下之狀態之刀片組100中，（參照圖3)，曲軸 構件170可相對於一對剪切刀片而自如地移動並旋轉。此 時，在本實施例之刀片組100中’曲軸構件17〇不論相對於 一對剪切刀片110、120如何地相對移動及相對旋轉，藉由 偏心凸輪130、140之凸緣134、144及中間刀片15〇，可防❹ 止曲軸構件170從一對剪切刀片11〇、12〇脫離。因此，將 刀片組100女裝於主體12時，或將刀片组1〇〇從主體η卸下 . 時，不會發生曲軸構件17〇從刀片組1〇〇脫落之情形。使用 者可簡單地進行交換刀片組1 00之作業。 此處，就一對偏心凸輪130、140與中間刀片150之尺寸 關係作說明。中間刀片I5G之半徑係等於上側偏心凸輪130 之偏移距離加上上側偏心凸輪130之凸緣134之半徑之尺 143293.doc 12 201026221 寸。再者，中間刀片150之半徑亦等於下側偏心凸輪i4〇之 偏移距離加上下側偏心凸輪14 0之凸緣14 4之半徑之尺寸。 此處，上側偏心凸輪13〇之偏移距離所指為：自曲軸構件 170之旋轉軸（即，旋轉中心孔176之中心軸）起至上側偏心 凸輪130之圓板形狀之中心軸止之距離。同樣的，下側偏 心路140之偏移距離所指為：自曲軸構件17〇之旋轉軸起至 下側偏心凸輪140之圓板形狀之中心軸止之距離。即，將 藝曲軸構件170沿著其旋轉軸而俯視時，上側偏心凸輪13〇之 凸緣134之外周緣，係成為内接於中間刀片150之外周緣之 位置關係，且下側偏心凸輪M0之凸緣} 44之外周緣亦成為 内接於中間刀片150之外周緣之位置關係。 根據上述之尺寸之關係，中間刀片15〇之構造為，相對 於上側偏心凸輪13〇之凸緣134之整體為對向，並相對於下 側偏心凸輪140之凸緣144之整體亦為對向。根據該構造， 剪切刀片110、12〇之基端部112、122緊緊地嵌入利用凸緣 φ 134、144與中間刀片15〇所形成之槽，從而可確實地防止 煎切刀片110、120之嵌合孔114、124從偏心凸輪130、140 脫離。 再者，中間刀片150之半徑宜為大於上側偏心凸.輪13〇之 偏移距離加上上側偏心凸輪13 0之凸緣13 4之半徑而成之尺 寸。根據該構造，中間刀片150亦與形成於上側偏心凸輪 130之凸緣134之整體相對向。同樣的，中間刀片15〇之半 徑宜為大於下側偏心凸輪140之偏移距離加上下側偏心凸 輪140之凸緣144之半徑而成之尺寸。根據該構造，中間刀 143293.doc •13· 201026221 對 二5。亦與形成於下側偏心凸輪14〇之凸緣⑷之整體相 就銷構件160之結構作說明。各個銷構件 :…之銷部分162、及位於下端之螺釘部分164 刀162自上側偏心凸輪13()向著上方與曲轴構件⑺之旋 軸平行延伸，並插人減速㈣之銷插人孔I =具有類似六角螺栓之形狀，並螺入於形成於曲轴^ 170之鎖固孔178。藉此，上側偏心凸輪13〇、中間刀片 15〇、及下側偏心凸輪140藉由螺釘部分164相互鎖固於板 厚方向。再者，在形成於曲軸構件17〇之連結孔m中僅 在形成於下側偏心凸輪140之部分形成有内螺紋。如此， 二個銷構件16〇既是將減速齒輪34與曲轴構件m無法相對 旋轉而連接之構件，亦是將一對偏心凸輪⑽、"Ο與中間 刀片150相互鎖固之構件。由於減速齒輪34與曲軸構件二 之連接、及一對偏心凸輪13〇、14〇與中間刀片"Ο之鎖固 可由共通之銷構件160得以實現，故曲軸構件17〇之結構 相對較簡單。 又’將一對偏心凸輪130、140與中間刀片15〇藉由螺釘 部分164而鎖固之構造，相較於利用焊接或鍛造而接合之 構造更容易組裝，且生產性或維修性高，亦可抑制成本。 又，偏心凸輪130、140與中間刀片15〇之間不會形成空 隙，從而可確實地防止剪切刀片11〇、之嵌合孔ιΐ4、 124從偏心凸輪13〇、i4〇脫離之情況。 以上，雖就本發明之實施形態已詳細說明，但該等只不 143293.doc •14- 201026221 圍者。在揭示專利請求範 之具體例加以各種變形、 過為例示，並非限制專利請求範 圍之技術中，可包含將以上例示 變更後者。 - w如’在上述中’雖已說明實施本發明之籬琶修剪器 • 1G ’纟本實施例所說明之技術亦可適用於草坪修勢器等之 其他種類之園藝用修煎器。 又，本實施例之籬笆修剪器10雖是以使一對剪切刀片 φ U〇、U〇滑動的方式（直線性的）往復運動之類型之園藝用 修剪器’但在本實施例所說明之技術亦可適用於以使一對 剪切刀片擺動的方式往復運動之類型之園藝用修勢器。 本說明書或設計圖所說明之技術要素為藉由單獨或各種 組合而發揮技術性有效性者，並不限定於在提出申請時之 請求項所揭示之組合。本說明書或設計圖所例示之技術可 同時達成複數之目的，而達成其中一個目的本身即具有技 術性有效性。 φ 【圖式簡單說明】 圖1係實施例之籬笆修剪器之側方截面圖； 圖2係顯示擴大圖1中之π部； 圖3係顯示從原體取下之刀月組；及 圖4係顯示拆卸刀片組。 【主要元件符號說明】 10 籬笆修剪器 12 主體 30 馬達 143293.doc 201026221 32 34 34a 36 100 110 114 120 124 130 134 140 144 150 160 162 164 170 馬達之輸出轴 減速齒輪 銷插入孔 中心軸 刀片組 上侧剪切刀片 上側剪切刀片之嵌合孔 下側剪切刀片 下侧剪切刀片之嵌合孔 上側偏心凸輪 上側偏心凸輪之凸緣 下側偏心凸輪 下側偏心凸輪之凸緣 中間刀片 銷構件 銷部分 螺釘部分 曲軸構件 143293.doc •16-(Form 3) The #4- > n - fcA pair bias cams are offset from each other with respect to the rotation axis of the crank member in the opposite direction, i.e., the pair of eccentric cams have 180 degrees. The phase difference is eccentrically rotated and arranged. (dead state 4) each cam and φρ bow ημ曰^_print, φ delineated Ningjian blade has a circular plate shape. The radius of the intermediate blade is equal to the offset distance of the eccentric cam plus the radius formed by the rim of the eccentric cam. [Embodiment] An embodiment of the present invention will be described with reference to a plan view. Fig. 1 shows the appearance of the fence of the present embodiment. The fence trimmer 10 is mainly used for the trimming of the fence. The m & power tool is one of the garden trimmers. • As shown in Fig. 1, the hedge trimmer 10 is provided with a main body 12 and a blade set (9) attached to the main body 12. The blade set is fixed for the main body 12 and is detached from the main body. The blade set 100 is provided with a pair of shearing blades 11n ^ force J knife months 110, 12 〇 and a crank member. Each of the shearing blades 110, 120 is slidably supported by a rabbit, and is configured to reciprocate by the rotation of the crank member 170. On each of the cutting blades U0, 120, a plurality of 118, 128 (see Fig. 3) are provided along the reciprocating direction, and the branches are cut by the relative reciprocation of the -f cutting blades 110, 12?. About the knife 143293.doc 201026221 will be explained in detail in the following paragraph. The body 12 has a housing 20. On the outer casing 20, a chip guard 14 is provided for preventing the cutting of the debris, and the user holds the front handle μ and the main handle 22. On the handle 16 and the main handle 22, operation switches 18, 24 for opening the fence trimmer are provided. The two operation switches 18, 24 are coupled by the link mechanism 28 in the casing 20. Inside the casing 20, a motor 3, a reduction gear 34, and a center shaft 36 are provided. The center shaft 36 supports the reduction gear 34 and the crank member 17A to be rotatable. The reduction gear 34 is configured to be engaged with the output shaft 32 of the motor 30 and rotated by the motor 30. The reduction gear 34 is coupled to the crank member 17 so as not to be relatively rotatable, and the reduction gear 34 is integrally rotated with the crank member 17. That is, the torque from the motor 3〇 is transmitted to the crank member 17A via the reduction gear 34. In this manner, the motor 3〇, the reduction gear, and the center shaft 36 constitute a drive mechanism for rotating the crank member 17A. The blade set 100 determines its position within the outer casing 2〇 by a plurality of pins 1〇1. The plurality of pins 101 are supported by the left and right side walls of the outer casing 2〇. The outer casing 2 is detachable from the left and right sides. The blade set 100 is detachable by disassembling the outer casing 2, and the blade set 100 is fixed to the outer casing 20 by assembling the outer casing 20. Figure 2 is an enlarged view of the portion indicated by the symbol II of Figure 1. Figure 3 shows the shearing blade 1 拆 removed from the main body. Fig. 4 shows the state after the shearing blade group is disassembled. - The structure of the cutting blade set will be described in detail with reference to Figs. 2, 3, and 4. The cutting blade set 100 mainly has a pair of shearing blades u〇, 12〇, and supports a pair of 'cutting blades as a slidable upper side guide plate (7) 2 and a lower side guide plate i 〇 4, 143293.doc 201026221 and a crank member 170 . The pair of shearing blades 110, 120 are constituted by the upper shearing blade u and the lower shearing blade i2. A fitting hole 114 is formed in the base end portion 112 of the upper shearing blade 110. The fitting hole 114 has an elliptical shape whose long radius extends perpendicularly with respect to the direction in which the upper shearing blade 110 reciprocates. Similarly, the base end portion 122' of the lower shearing blade 120 is also formed with a fitting hole 124. The obstruction hole 124 has an elliptical shape whose long radius extends perpendicularly with respect to the direction in which the lower shearing blade i2 往复 reciprocates. The crank member 1 70 is disposed in the fitting holes 114 and 124 of the pair of shearing blades 丨丨〇 and i 2〇. The crank member 170 is mainly composed of an upper eccentric cam 13 (), a lower eccentric cam 140, an intermediate blade 15A, and two pin members 16A. The upper eccentric cam 130, the lower eccentric cam 14A, and the intermediate blade 15A each have a substantially circular plate shape. The upper eccentric cam 13 〇 and the lower eccentric cam 140 have the same diameter. On the other hand, the intermediate blade 15A has a larger diameter than the upper eccentric cam 130 and the lower eccentric cam 14A, the upper eccentric cam 130 is disposed above the intermediate blade 15A, and the lower eccentric cam 140 is disposed at the intermediate blade 15A. Below. That is, the crank member po has a three-layer structure in which three discs of the upper eccentric cam 13 〇, the intermediate blade 15 〇, and the lower eccentric cam 140 are superposed. The crank member 17 is formed with a rotation center hole 176 through which the center axis % is inserted, and is supported to be rotatable with the central axis % as a rotation axis. The two pin members 160 extend parallel to the rotary ten-hole 176 from the upper surface of the upper eccentric cam 130 at a position deviated from the rotation center hole 176. The two pin members 160 are inserted into the pin insertion holes 34 & provided in the reduction gear so that the crank member 143293.doc 201026221 member 170 and the reduction gear 34 are not rotatable relative to each other. The structure of the pin member 160 will be described in detail later. The upper eccentric cam 130 has a diameter which is slightly smaller than the short radius of the fitting hole 114 of the upper shearing blade 11, and is fitted to the fitting hole 114 of the upper cutter blade 100 with a slight gap. As shown in Fig. 4, the central axis of rotation 176 is formed at a position (offset position) deviated from the central axis of the disk shape of the upper eccentric cam 13G. Therefore, when the crank member 170 is rotated, the upper eccentric cam 130 is eccentrically rotated. The upper shearing blade 110 reciprocates in a manner to advance and retreat with respect to the main body 12 (in the left-right direction of Figs. 1 and 2) by the eccentric rotation of the upper eccentric cam 13〇. The lower eccentric cam 14'' has a diameter slightly smaller than the short radius of the fitting hole ad of the lower shearing blade 12'', and i is embedded in the lower-side shearing blade 120 with a slight gap. As shown in Fig. 4, the central axis of rotation 176 is formed at a position (position shifted) from which the central axis of the disk shape of the lower eccentric cam 14 is offset. Therefore, when the crank member 丨7〇 is rotated, the lower eccentric cam 140 is eccentrically rotated. The lower shearing blade 120 reciprocates in a manner to advance and retreat with respect to the main body 12 (in the left-right direction of Figs. 1 and 2) by the eccentric rotation of the lower eccentric cam 14''. Here, the rotation center hole m is displaced in the opposite direction in the upper eccentric cam 13 〇 and the lower eccentric cam 14 。. Thereby, the upper eccentric cam " ο and the lower eccentric cam 140 will be 18 相互 each other. The phase difference is eccentric rotation. As a result, the upper shearing blade 11G and the lower shearing blade 12 will reciprocate with each other with a fresh phase difference. That is, while the upper side of the dicing blade ιι is advanced relative to the main body 12, the lower shearing blade (2) retreats relative to the main body 12 143293.doc • 10· 201026221 while the upper shearing blade 110 retreats relative to the main body 12 The lower shearing blade 12 is advanced relative to the main body 12. A flange 134 is formed on the outer circumferential surface of the upper eccentric cam 130. The flange 134 is formed at the upper end of the upper eccentric cam 13A, and is formed over the entire circumference of the upper eccentric cam 13'. The diameter of the flange 134 is larger than the short radius of the fitting hole 114 of the upper shearing blade u, and a portion of the flange 134 is projected above the base end portion 112 of the upper shearing blade 110. By having the flange 134 above the base end portion 112 of the upper shearing blade ι1, the base end portion Π2 of the upper shearing blade 110 is prevented from moving upward', thereby preventing the fitting hole 1丨4 from the upper side The eccentric cam 130 is disengaged. Similarly, a flange 144 is formed on the outer peripheral surface of the lower eccentric cam 140. The flange 144 is located at the lower end of the lower eccentric cam 140 and is formed over the entire circumference of the lower eccentric cam 140. The diameter of the flange 144 is larger than the short radius of the fitting hole 124 of the lower shearing blade 120, and a portion of the flange 144 is protruded below the base end portion IK of the lower shearing blade 120. By the presence of the flange 144 above the base end portion 122 of the lower shearing blade 120, the base end portion 122 of the lower side cutting blade 120 is prohibited from moving downward, thereby preventing the fitting hole 124 from being eccentrically camed from the lower side. 14〇 detached. The intermediate blade 150 is larger than the upper eccentric cam 130 and the lower eccentric cam 14A, and is interposed between the base end portion 丨i 2 of the upper shearing blade 11 与 and the base end portion 122 of the lower shearing blade 120. By the intermediate blade 150 being present below the base end portion 112 of the upper shearing blade 11, the base end portion 112 of the upper shearing blade 11 is prevented from moving downward, thereby preventing the upper shearing blade 11 from being smashed. The fitting hole 114 is disengaged from the upper eccentric cam 130. Further, the intermediate blade 150 is present above the base end portion 122 of the blade 120 by the lower side cutting 143293.doc -11 - 201026221, and the base end portion of the lower blade 120 is cut at the lower side. The movement above 122 is prohibited, so that the fitting hole 124 of the lower shearing blade 120 can be prevented from being detached from the upper eccentric cam 140. As described above, in the blade set 100 of the present embodiment, the intermediate blade 150 is provided between the pair of eccentric cams 130, 140, and further, the respective eccentric cams 130, 140 are formed with the sandwich cutting blade 11 〇, 12〇 and the flanges 134, 144 opposite the intermediate blade 150. According to this configuration, the base end portions 112, 122 of the mowing blades 110, 120 are held from both sides Q in the thickness direction by the intermediate blade 150 and the flanges 134, 144 of the eccentric cams 130, 140 opposed thereto. . According to this configuration, even when a strong external force is applied to the shearing blades 1 1 〇, i, the fitting holes 114, 124 of the shearing blades 10, 120 can be surely prevented from coming off the eccentric cams 130, 140. In the blade set 100 in a state of being detached from the main body, (see Fig. 3), the crank member 170 is freely movable and rotatable relative to the pair of shearing blades. At this time, in the blade set 100 of the present embodiment, the crankshaft member 17 is relatively moved and relatively rotated with respect to the pair of shearing blades 110, 120, by the flanges 134, 144 of the eccentric cams 130, 140 and The intermediate blade 15 is configured to prevent the crank member 170 from being detached from the pair of shearing blades 11A, 12B. Therefore, when the blade set 100 is worn on the main body 12 or the blade set 1〇〇 is detached from the main body η, the situation in which the crank member 17〇 is detached from the blade set 1〇〇 does not occur. The user can simply exchange the work of the blade set 100. Here, the dimensional relationship between the pair of eccentric cams 130, 140 and the intermediate blade 150 will be described. The radius of the intermediate blade I5G is equal to the offset distance of the upper eccentric cam 130 plus the radius of the flange 134 of the upper eccentric cam 130 143293.doc 12 201026221 inches. Further, the radius of the intermediate blade 150 is also equal to the size of the offset of the lower eccentric cam i4 加上 plus the radius of the flange 14 4 of the lower eccentric cam 140. Here, the offset distance of the upper eccentric cam 13 is referred to as the distance from the rotation axis of the crank member 170 (ie, the central axis of the rotation center hole 176) to the center axis of the disk shape of the upper eccentric cam 130. . Similarly, the offset distance of the lower eccentric path 140 is referred to as the distance from the rotation axis of the crank member 17A to the center axis of the disk shape of the lower eccentric cam 140. That is, when the art crank member 170 is viewed in plan along the rotation axis thereof, the outer periphery of the flange 134 of the upper eccentric cam 13 is in a positional relationship in which the outer periphery of the intermediate blade 150 is inscribed, and the lower eccentric cam M0 The outer periphery of the flange} 44 also becomes a positional relationship inscribed in the outer periphery of the intermediate blade 150. According to the above-described relationship of the dimensions, the intermediate blade 15 is configured to be opposed to the entirety of the flange 134 of the upper eccentric cam 13A, and is also opposed to the entirety of the flange 144 of the lower eccentric cam 140. . According to this configuration, the base end portions 112, 122 of the shearing blades 110, 12 are tightly fitted into the grooves formed by the flanges φ 134, 144 and the intermediate blade 15 ,, so that the dicing blades 110, 120 can be surely prevented. The fitting holes 114, 124 are detached from the eccentric cams 130, 140. Further, the radius of the intermediate blade 150 is preferably larger than the radius of the upper eccentric convex wheel 13 〇 and the radius of the flange 13 4 of the upper eccentric cam 130. According to this configuration, the intermediate blade 150 is also opposed to the entirety of the flange 134 formed on the upper eccentric cam 130. Similarly, the radius of the intermediate blade 15 is preferably larger than the offset distance of the lower eccentric cam 140 plus the radius of the flange 144 of the lower eccentric cam 140. According to this configuration, the intermediate knife is 143293.doc •13· 201026221 to two. The structure of the pin member 160 is also described with respect to the entire flange (4) formed on the lower eccentric cam 14''. The pin portion 162 of each pin member: and the screw portion 164 at the lower end of the blade 162 extend from the upper eccentric cam 13 () upwardly in parallel with the axis of rotation of the crank member (7), and is inserted into the pin for deceleration (4). It has a shape similar to a hexagonal bolt and is screwed into a locking hole 178 formed in the crankshaft 170. Thereby, the upper eccentric cam 13 〇, the intermediate blade 15 〇, and the lower eccentric cam 140 are locked to each other in the thickness direction by the screw portion 164. Further, in the connection hole m formed in the crank member 17A, an internal thread is formed only in a portion formed in the lower eccentric cam 140. In this manner, the two pin members 16 are members that are connected to each other by the rotation of the reduction gear 34 and the crank member m, and are members that lock the pair of eccentric cams (10), " and the intermediate blade 150 to each other. Since the connection of the reduction gear 34 to the crank member 2 and the locking of the pair of eccentric cams 13A, 14A and the intermediate blade can be realized by the common pin member 160, the structure of the crank member 17 is relatively simple. Further, the structure in which the pair of eccentric cams 130 and 140 and the intermediate blade 15 are locked by the screw portion 164 is easier to assemble than the structure joined by welding or forging, and the productivity or maintainability is high. Can suppress costs. Further, no gap is formed between the eccentric cams 130, 140 and the intermediate blade 15A, so that the shearing blades 11b and the fitting holes ι4, 124 can be surely prevented from being separated from the eccentric cams 13a, i4. Although the above has been described in detail with respect to the embodiments of the present invention, these are only 143293.doc •14-201026221. In the technique of disclosing the patent request specification, various modifications, and exemplifications, and not limiting the scope of patent claims, the latter may be modified by the above examples. - w, as described above, although the fence trimmer embodying the present invention has been described. The technology described in this embodiment can also be applied to other types of gardening frying appliances such as lawn trimmers. Further, the fence trimmer 10 of the present embodiment is a garden trimmer of the type of reciprocating motion of a pair of shearing blades φ U 〇 and U 〇 (linearly), but is described in the present embodiment. The technique can also be applied to a gardening trimmer of the type that reciprocates in such a manner that a pair of shearing blades are oscillated. The technical elements described in the specification or the drawings are technically effective by individual or various combinations, and are not limited to the combinations disclosed in the claims at the time of filing. The techniques exemplified in this specification or the design drawings can achieve the plural purpose at the same time, and achieving one of the objectives is technically effective in itself. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a side cross-sectional view of a fence trimmer of the embodiment; Fig. 2 is a view showing an enlarged π portion of Fig. 1; Fig. 3 is a view showing a knife group removed from a original body; The 4 series shows the removal of the blade set. [Main component symbol description] 10 Fence trimmer 12 Main body 30 Motor 143293.doc 201026221 32 34 34a 36 100 110 114 120 124 130 134 140 144 150 160 162 164 170 Motor output shaft reduction gear pin insertion hole center shaft blade set Fitting hole of the upper shearing blade of the side shearing blade, lowering side of the lower cutting blade, the lower side of the cutting blade, the upper side of the eccentric cam, the upper side of the eccentric cam, the lower side of the eccentric cam, the lower side of the lower eccentric cam, the intermediate blade pin member Pin part screw part crankshaft member 143293.doc •16-