JP2010115181A

JP2010115181A - Lawn mower

Info

Publication number: JP2010115181A
Application number: JP2008292570A
Authority: JP
Inventors: Shinji Ogawa; 真二小川
Original assignee: Ryobi Ltd
Current assignee: Ryobi Ltd
Priority date: 2008-11-14
Filing date: 2008-11-14
Publication date: 2010-05-27
Anticipated expiration: 2028-11-14
Also published as: JP5143703B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lawn mower enabling lawn-mowing height to be adjusted by a simple adjusting operation. <P>SOLUTION: The lawn mower 1 is installed on the body 3 and includes a base member in contact with lawn and a convex-concave fastener 8 for fixing the base member 6 onto the body 3; wherein the fastener 8 includes a plurality of recessed parts 33 formed either one of the body 3 and the base member 6 and a pair of projected parts 63 formed on either one of them. In the lawn mower, the base member 6 has a release knob 80 functioning to keep the recessed parts and the projected parts fixed or make both of them unfixed; wherein the release knob 80 is set on the base member 6 turnably and has projections 80a and 80b for fixing or unfixing the recessed parts 33 and the projected parts 63, and the projections 80a and 80b can be transferred, by turning the release knob 80, from/to a fixing position where the recessed parts 33 and the projected parts 63 are fixed to/from an unfixing position where these parts 33 and 63 are unfixed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、芝刈り機に係り、特に、芝の刈り込み高さを調整する機構を備えた芝刈り機に関するものである。 The present invention relates to a lawn mower, and more particularly, to a lawn mower provided with a mechanism for adjusting the lawn mowing height.

従来から、地面に生えている芝の刈り込み作業に用いられる芝刈り機が知られている。この種の芝刈り機は、例えば、固定刃と可動刃とを重ねて配置し、可動刃を固定刃に対して横方向に往復運動させることで芝を刈り込むことができるようになっている。また、２枚の可動刃を重ねて配置し、それぞれの可動刃を横方向に、且つ互いの可動刃を逆方向に往復運動させることで芝を刈り込むような芝刈り機も存在する。さらに、固定刃と可動刃とを重ねて配置し、可動刃を回転運動させることで芝を刈り込む芝刈り機も存在する。 2. Description of the Related Art Conventionally, lawn mowers used for cutting grass growing on the ground are known. In this type of lawn mower, for example, a fixed blade and a movable blade are arranged so as to overlap each other, and the lawn mower can be trimmed by reciprocating the movable blade in the lateral direction with respect to the fixed blade. There is also a lawn mower that cuts grass by arranging two movable blades in a stacked manner and reciprocating each movable blade in the lateral direction and in the opposite direction. Furthermore, there is a lawn mower that mows the lawn by arranging the fixed blade and the movable blade in an overlapping manner and rotating the movable blade.

そして、上記のような芝刈り機にあっては、所定の高さで芝を刈り込むことを目的として、様々な工夫が施された芝刈り機が存在している。 In the lawn mowers as described above, there are lawn mowers that have been devised in various ways for the purpose of mowing the lawn at a predetermined height.

特開２００７−４４０３７号公報JP 2007-44037 A

特許文献１に記載の芝刈り機は、ブレードを備える本体と、本体の下方前方及び後方に配置される２つの本体位置決め部を介して配置されるとともに、刈り込み対象と接する摺動面を備えるスライダと、下方前方又は後方に配置される本体位置決め部のいずれか一方とスライダとを固定することによって、本体のスライダに対する位置決め固定を実現する固定具と、を備える芝刈り機であって、ブレードの面が、スライダの摺動面に対して略平行方向に配置され、且つ、スライダの摺動面に対する略平行状態を維持したままブレードとの間隔を調整自在とされている。 A lawnmower described in Patent Document 1 is a slider provided with a main body including a blade and two main body positioning portions disposed on the lower front side and the rear side of the main body, and having a sliding surface in contact with the object to be trimmed. A lawn mower comprising: a blade mowing machine, and a fixing tool that fixes the positioning of the main body with respect to the slider by fixing either one of the main body positioning portions disposed on the lower front side or the rear side and the slider. The surface is arranged in a direction substantially parallel to the sliding surface of the slider, and the distance from the blade can be adjusted while maintaining a substantially parallel state with respect to the sliding surface of the slider.

このようにして構成された特許文献１に記載の芝刈り機は、スライダの摺動面がブレードの面と略平行状態を維持したまま、ブレードとスライダの間隔を調整することが可能となっており、これによって、ブレードが上下方向に平行移動し、地面からの芝の刈り込み高さを調整するものである。 The lawn mower described in Patent Document 1 configured as described above can adjust the distance between the blade and the slider while maintaining the sliding surface of the slider substantially parallel to the surface of the blade. As a result, the blade moves in parallel in the vertical direction and adjusts the height of grass clipping from the ground.

しかしながら、特許文献１に記載の芝刈り機は、高さ調整を行う際において、本体３とベース部材６とを固定又は解除する時の固定具の締め付けは、つまみをねじによって締め付けているため、しっかりと固定するのには所定の力が必要であった。また、つまみを回して締め付けるためにはその締付及び緩めるのに時間がかかっていた。 However, in the lawn mower described in Patent Document 1, when the height adjustment is performed, the fastening of the fixture when fixing or releasing the main body 3 and the base member 6 is performed by tightening the knob with a screw. A certain force was required to secure it firmly. In addition, it takes time to tighten and loosen to turn the knob.

そこで、本発明は上述した問題に鑑みてなされたものであり、刈り込み作業の邪魔にならず、より単純な調整操作で刈り込み高さの調整をすることができ、確実に位置決め固定をすることができる芝刈り機を提供することを目的とする。 Therefore, the present invention has been made in view of the above-described problems, and does not interfere with the trimming work, and the trimming height can be adjusted by a simpler adjustment operation, so that positioning and fixing can be reliably performed. An object is to provide a lawn mower that can be used.

以下、本発明について説明する。なお、本発明の理解を容易にするために添付図面の参照番号を括弧書きにて付記するが、それにより本発明が図示の形態に限定されるものではない。 The present invention will be described below. In addition, in order to make an understanding of this invention easy, the reference number of an accompanying drawing is attached in parenthesis writing, However, This invention is not limited to the form of illustration by it.

本発明に係る芝刈り機（１）はブレード（２）を備える本体（３）と、前記本体（３）に取り付けられ、刈り込み対象と接する摺動面（６ａ）を有するベース部材（６）とを備え、前記ブレード（２）の面が、前記ベース部材（６）の摺動面（６ａ）に対して略平行方向に配置され、前記ベース部材（６）の摺動面（６ａ）が、前記ブレード（２）の面に対する略平行状態を維持したまま前記ブレード（２）との間隔を調整自在とされている芝刈り機（１）であって、前記本体（３）に対して前記ベース部材（６）を固定する凹凸係合部（８）を備え、前記凹凸係合部（８）は、前記本体（３）又は前記ベース部材（６）のいずれか一方に形成された複数の凹部（３３）と、前記ベース部材（６）又は前記本体（３）のいずれか他方に形成された一対の凸部（６３）とを備え、前記ベース部材（６）には、前記凹部（３３）と凸部（６３）の固定を維持又は固定を解除する切替手段（８０）を備え、前記切替手段（８０）は、前記ベース部材（６）に回動可能に取り付けられる固定解除ノブを備え、前記固定解除ノブは、前記凹部（３３）と凸部（６３）を固定又は解除可能にするための突起（８０ａ、８０ｂ）を有し、前記突起（８０ａ、８０ｂ）は、前記固定解除ノブの回動により前記凹部（３３）と凸部（６３）を固定する固定位置と前記凹部（３３）と凸部（６３）の固定を解除する解除位置に移動可能であることを特徴とする。 The lawn mower (1) according to the present invention includes a main body (3) having a blade (2), a base member (6) having a sliding surface (6a) attached to the main body (3) and in contact with the object to be cut. The surface of the blade (2) is arranged in a direction substantially parallel to the sliding surface (6a) of the base member (6), and the sliding surface (6a) of the base member (6) A lawnmower (1) in which a distance between the blade (2) and the blade (2) can be adjusted while maintaining a substantially parallel state with respect to the surface of the blade (2), and the base with respect to the main body (3). A concave / convex engaging portion (8) for fixing the member (6) is provided, and the concave / convex engaging portion (8) is a plurality of concave portions formed in either the main body (3) or the base member (6). (33) and the base member (6) or the main body (3). A pair of convex portions (63), and the base member (6) includes switching means (80) for maintaining or releasing the fixing of the concave portion (33) and the convex portion (63), The switching means (80) includes a fixing release knob rotatably attached to the base member (6), and the fixing release knob can fix or release the concave portion (33) and the convex portion (63). Projections (80a, 80b) for fixing the concave portion (33) and the convex portion (63) by the rotation of the fixing release knob and the concave portion (33). ) And the convex portion (63) can be moved to a release position for releasing the fixation.

また、本発明に係る芝刈り機において、前記本体（３）は前記本体（３）の下方前方に第１の当接部（３１）を備えるとともに、前記第１の当接部（３１）と前記凹凸係合部（８）の間に第２の当接部（３２）を備え、前記ベース部材（６）は前記第１の当接部（３１）と当接する第１の支持部（６１）と、前記摺動面（６ａ）の後方端から上方に傾斜して延びる前記本体（３）と対向する面に前記第２の当接部（３２）と当接する第２の支持部（６２）を備えることを特徴とする。 In the lawn mower according to the present invention, the main body (3) includes a first abutting portion (31) on the lower front side of the main body (3), and the first abutting portion (31). A second abutting portion (32) is provided between the concave and convex engaging portions (8), and the base member (6) is a first supporting portion (61) that abuts on the first abutting portion (31). ), And a second support portion (62) that contacts the second contact portion (32) on a surface facing the main body (3) extending upwardly from the rear end of the sliding surface (6a). ).

また、本発明に係る芝刈り機において、前記ベース部材（６）の後方には、前記本体（３）と前記ベース部材（６）との固定を解除する操作部（６ｄ）を備え、前記操作部（６ｄ）の後端は前記本体（３）の後端部よりも後方へ突出していることを特徴とする。 In the lawn mower according to the present invention, an operation portion (6d) for releasing the fixation between the main body (3) and the base member (6) is provided behind the base member (6), The rear end of the portion (6d) protrudes rearward from the rear end of the main body (3).

また、本発明に係る芝刈り機において、前記ベース部材（６）は、前方から後方端部に延びる集芝部（７０）を備えているとともに、後方が略双胴艇の舳先の形状に形成されて前記後方端部の集芝部（７０）が左右に区分けされていることを特徴とする。 Further, in the lawn mower according to the present invention, the base member (6) includes a lawn collecting portion (70) extending from the front to the rear end, and the rear is formed substantially in the shape of the tip of a catamaran. In addition, the grass collecting portion (70) at the rear end is divided into right and left.

また、本発明に係る芝刈り機において、前記ベース部材（６）は、前記本体（３）の全長よりも長く形成されていることを特徴とする。 In the lawn mower according to the present invention, the base member (6) is formed longer than the entire length of the main body (3).

本発明に係る芝刈り機によれば、固定解除ノブを用いて容易にベース部材に対する本体の固定及び解除を行い、簡単な操作で刈り込み高さの調整ができる。また、ベース部材を大きくしたことで従来の芝刈り機よりも芝を多く集められ、芝を廃棄する頻度を少なくできる。また、ベース部材の後端を略双胴艇の舳先の形状としたため、芝刈り機を後方に引く際に、当該ベース部材が芝に引っかかることなく滑らかに後退させることができる。さらに、ベース部材を本体の全長よりも長くしたので、本体が安定し、本実施形態のように操作部が本体から離れている場合であっても安定して芝刈りを行うことができる。 According to the lawn mower according to the present invention, the main body can be easily fixed to and released from the base member by using the fixing release knob, and the cutting height can be adjusted with a simple operation. In addition, since the base member is made larger, more turf can be collected than the conventional lawn mower, and the frequency of discarding the turf can be reduced. In addition, since the rear end of the base member is substantially the shape of the tip of a catamaran, when the lawn mower is pulled backward, the base member can be smoothly retracted without being caught by the grass. Further, since the base member is longer than the entire length of the main body, the main body is stable, and even when the operation unit is separated from the main body as in this embodiment, mowing can be performed stably.

以下、本発明を実施するための好適な実施形態について、図面を用いて説明する。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。 DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described with reference to the drawings. 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. .

図１は本実施形態に係る芝刈り機の部分断面を含む全体構造を示す正面図、図２は芝刈り機の平面図、図３は芝刈り機の本体とベース部材の一部断面正面図、図４はベース部材の平面斜視図、図５はベース部材の底面斜視図、図６は本体とベース部材の組付状態を示す一部断面正面図、図７は固定解除ノブ近傍の拡大図、図８は固定解除ノブの縦断面図、図９は固定解除ノブがベース部材に取付けられた時の簡易構成図、図１０は図９のＡ−Ａ断面図、図１１は高さ調整機構の動作を説明するための一部断面正面図である。 1 is a front view showing an overall structure including a partial cross section of a lawn mower according to the present embodiment, FIG. 2 is a plan view of the lawn mower, and FIG. 3 is a partial cross-sectional front view of a main body and a base member of the lawn mower. 4 is a plan perspective view of the base member, FIG. 5 is a bottom perspective view of the base member, FIG. 6 is a partial sectional front view showing the assembled state of the main body and the base member, and FIG. 7 is an enlarged view of the vicinity of the fixing release knob. 8 is a longitudinal sectional view of the fixing release knob, FIG. 9 is a simplified configuration diagram when the fixing release knob is attached to the base member, FIG. 10 is a sectional view taken along the line AA in FIG. 9, and FIG. It is a partial cross section front view for demonstrating operation | movement of (2).

なお、説明し易いように、図１に示す芝刈り機の右側を前方、左側を後方として説明する。また、以下の説明において、本体の内部構造については一般的な電動式の芝刈り機と同様であるので、簡単に説明をするものとする。 For ease of explanation, the right side of the lawn mower shown in FIG. In the following description, the internal structure of the main body is the same as that of a general electric lawn mower, so that it will be briefly described.

本実施形態に係る芝刈り機１は、起動操作等を延長ハンドルで操作できるタイプの一般にポールバリカンと称される芝刈り機であって、使用者が立った状態で、片手で持って地面に生えた芝を一定の高さに刈り込み可能である。また、当該芝刈り機１は、芝の刈り込み高さを調整することができ、且つ、その調整作業を容易に行うことができる高さ調整機構を備えている。 The lawn mower 1 according to the present embodiment is a lawn mower generally called a pole clipper of a type that can be operated with an extension handle for starting operation and the like, and is held on the ground with one hand while the user is standing. It is possible to trim the turf that grows up to a certain height. Further, the lawn mower 1 includes a height adjustment mechanism that can adjust the lawn mowing height and can easily perform the adjustment work.

図１に示すように、本実施形態に係る芝刈り機１は、芝を刈り込むブレード２を下方前方に突出させて備えている本体３と、本体３の下方に配置され、地面Ｇに生えている芝生上を摺動するベース部材６とを備え、前記ベース部材６は前記本体３を支持するとともに、前記ベース部材６に対する前記本体３の位置を調整し、前記ブレード２の面を地面Ｇに対して略垂直方向に移動させて地面Ｇからのブレード２の高さＴを所定の刈刃高さに固定することができる。 As shown in FIG. 1, the lawn mower 1 according to this embodiment includes a main body 3 provided with a blade 2 for trimming the lawn that protrudes downward and forward, and is disposed below the main body 3 and grows on the ground G. A base member 6 that slides on the lawn. The base member 6 supports the main body 3, adjusts the position of the main body 3 with respect to the base member 6, and makes the surface of the blade 2 face the ground G. On the other hand, the height T of the blade 2 from the ground G can be fixed to a predetermined cutting blade height by moving in a substantially vertical direction.

本体３は、左右二つ割り片を突き合わせて形成されるハウジング３ａを有している。ハウジング３ａの内部には、ブレード２を駆動するモータ等の図示しない駆動部や当該駆動部からの動力をブレードに伝達するための動力伝達機構部、駆動部を電気的に制御するための基板などが内蔵されている。 The main body 3 has a housing 3a formed by abutting the left and right split pieces. Inside the housing 3a, a drive unit (not shown) such as a motor for driving the blade 2, a power transmission mechanism unit for transmitting power from the drive unit to the blade, a substrate for electrically controlling the drive unit, etc. Is built-in.

本体３の後方上部には、使用者が本体３を把持するための略Ｄ字状の把持部４を有している。この把持部４の内周前方には、トリガー５が設けられている。このトリガー５は、駆動部を駆動するためのスイッチとして機能する。芝刈り機１は、使用者によってこのトリガー５が押圧されることにより、駆動部が起動し、ブレード２が作動するようになっている。 On the rear upper part of the main body 3, there is a substantially D-shaped grip portion 4 for a user to grip the main body 3. A trigger 5 is provided in front of the inner periphery of the grip portion 4. The trigger 5 functions as a switch for driving the drive unit. The lawn mower 1 is configured such that when the trigger 5 is pressed by the user, the drive unit is activated and the blade 2 is activated.

また、前記把持部４には、所定のジョイント部２５を介して後方に延びるアーム部２６と、当該アーム部２６の先端に取り付けられる操作ハンドル部２７と、が着脱可能に取付けられている。アーム部２６は、ジョイント部２５を介して本体３に対して上下方向に回動可能に取り付けられており、本実施形態の芝刈り機１は、操作ハンドル部２７の高さ位置を自由に調整することが可能である。 In addition, an arm part 26 extending rearward via a predetermined joint part 25 and an operation handle part 27 attached to the tip of the arm part 26 are detachably attached to the grip part 4. The arm part 26 is attached to the main body 3 via the joint part 25 so as to be pivotable in the vertical direction. The lawn mower 1 according to this embodiment freely adjusts the height position of the operation handle part 27. Is possible.

操作ハンドル部２７は、使用者が把持するための把持部２８を有しており、当該把持部２８には、トリガー２８ａが設けられている。本実施形態の芝刈り機１は、トリガー５が常に押圧状態となるように把持部４にジョイント部２５が取り付けられており、当該操作ハンドル部２７に設けられたトリガー２８ａを用いて駆動部を起動させ、ブレード２を作動させるようになっている。 The operation handle portion 27 has a grip portion 28 for a user to grip, and the grip portion 28 is provided with a trigger 28a. In the lawn mower 1 of the present embodiment, the joint portion 25 is attached to the grip portion 4 so that the trigger 5 is always in a pressed state, and the drive portion is mounted using the trigger 28a provided on the operation handle portion 27. The blade 2 is activated and activated.

ここで図２に示すように、ブレード２は上刃２ａと下刃２ｂにより構成されており、上刃２ａと下刃２ｂの先端側には複数の刈刃が形成されている。このようにして、上刃２ａと下刃２ｂが互いの面に沿って揺動することにより、芝が両刃の刈刃間に挟まれて切断される。また、上刃２ａ及び下刃２ｂには、幅広タイプのものが使用されており、本体３の幅よりも広くなっている。 Here, as shown in FIG. 2, the blade 2 is composed of an upper blade 2a and a lower blade 2b, and a plurality of cutting blades are formed on the tip side of the upper blade 2a and the lower blade 2b. In this way, the upper blade 2a and the lower blade 2b swing along each other surface, so that the turf is sandwiched between the cutting blades of both blades and cut. The upper blade 2 a and the lower blade 2 b are of a wide type and are wider than the width of the main body 3.

このようにして使用者は、操作ハンドル部２７を片手で持ってトリガー２８ａを操作し、芝刈り機１を地面Ｇに生えている芝生上でスライド移動させることにより、地面Ｇに生えている芝を容易に刈り取ることが可能となっている。 In this way, the user operates the trigger 28a by holding the operation handle portion 27 with one hand, and slides the lawnmower 1 on the lawn growing on the ground G, whereby the lawn growing on the ground G is obtained. Can be easily reaped.

以下、本実施形態の芝刈り機１の高さ調整機構の構成について図１乃至図１１を用いて説明する。 Hereinafter, the configuration of the height adjustment mechanism of the lawn mower 1 of the present embodiment will be described with reference to FIGS. 1 to 11.

図１及び図２に示すように、ハウジング３ａの下方前方には、ハウジング３ａの左右両側に一対の第１の当接部３１が形成される。また、図１に示すように、ハウジング３ａの下方略中央には、本体３の左右に延びる第２の当接部３２が形成されている。 As shown in FIGS. 1 and 2, a pair of first abutting portions 31 are formed on the left and right sides of the housing 3 a at the lower front side of the housing 3 a. As shown in FIG. 1, a second abutting portion 32 that extends to the left and right of the main body 3 is formed at a substantially lower center of the housing 3 a.

図１及び図３に示すように、ハウジング３ａの下方後方には、ベース部材６を組み付けるために略中央部から後方上方に向かって傾斜して延びる断面が略Ｕ字状の収納凹部４ａが形成されている。ここで、前記収納凹部４ａは地面に対し、角度θの傾斜角で傾斜しており、角度θは４５度未満、望ましくは２５度である。また、この収納凹部４ａの左右両側には前後方向に延びるスライド面３５が形成されており、このスライド面３５は、前記収納凹部４ａと同様に角度θの傾斜角で傾斜している。また、スライド面３５の上面には、それぞれ３つの凹部３３が形成されている。また、前記第２の当接部３２は、前記収納凹部４ａの上面前方に形成されている。 As shown in FIGS. 1 and 3, a housing recess 4 a having a substantially U-shaped cross section is formed on the lower rear side of the housing 3 a so as to incline from the substantially central portion toward the rear upper side for assembling the base member 6. Has been. Here, the storage recess 4a is inclined with respect to the ground at an inclination angle of angle θ, and the angle θ is less than 45 degrees, preferably 25 degrees. Also, slide surfaces 35 extending in the front-rear direction are formed on the left and right sides of the storage recess 4a, and the slide surface 35 is inclined at an inclination angle of an angle θ, similar to the storage recess 4a. In addition, three concave portions 33 are formed on the upper surface of the slide surface 35, respectively. The second contact portion 32 is formed in front of the upper surface of the storage recess 4a.

一方、図１、図３乃至図５に示すようにベース部材６には、その下端に地面Ｇに生えている芝生上を摺動するための略水平状の摺動面６ａが形成されている。また、ベース部材６の後部は、略双胴艇の舳先の形状となるように中央部が凸状に盛り上げられて形成されている。 On the other hand, as shown in FIGS. 1 and 3 to 5, the base member 6 is formed with a substantially horizontal sliding surface 6 a at the lower end thereof for sliding on the lawn growing on the ground G. . In addition, the rear part of the base member 6 is formed by raising the central part in a convex shape so as to be approximately the shape of the tip of a catamaran.

また、図４に示すようにベース部材６の前方には、前記本体３の第１の当接部３１と当接し、前記本体３の前方を支持する階段状の第１の支持部６１が形成されている。また、ベース部材６の上面には、左右前方から左右後方にかけて、前記ブレード２により刈り込まれた芝生を捕集する集芝部７０が形成されている。 Further, as shown in FIG. 4, a step-like first support portion 61 is formed in front of the base member 6 to contact the first contact portion 31 of the main body 3 and support the front of the main body 3. Has been. Further, on the upper surface of the base member 6, a lawn collecting portion 70 that collects the lawn cut by the blade 2 is formed from the left and right front to the left and right rear.

さらに、図３乃至図５示すように、ベース部材６には中央部から後方上方に向けて傾斜して延びる高さ調整部６ｃと、その端部から後方へと略水平方向に延びる操作部６ｄが形成されている。この操作部６ｄは、ブレード２の刈り込み高さ調整のために利用者が操作するものであって、当該操作部６ｄは利用者が操作し易いように、その後端部が本体３の後端よりも後方に配置されている。このように操作部６ｄを本体３の後端よりも後方へ設けることで利用者は操作しやすく便利である。 Further, as shown in FIGS. 3 to 5, the base member 6 has a height adjusting portion 6 c extending inclined from the central portion toward the rear and upward, and an operation portion 6 d extending substantially horizontally from the end portion to the rear. Is formed. The operation unit 6d is operated by the user to adjust the trimming height of the blade 2, and the operation unit 6d has a rear end portion that is closer to the rear end of the main body 3 so that the user can easily operate the operation unit 6d. Is also located behind. By providing the operation unit 6d behind the rear end of the main body 3 in this way, the user can easily operate and is convenient.

図３及び図４に示すように、高さ調整部６ｃは断面が略Ｕ字形状に形成され、その上部には左右に突出する一対の鍔部６５が形成されている。ここで、前記高さ調整部６ｃは地面に対し、角度θの傾斜角で傾斜しており、角度θは４５度未満、望ましくは２５度である。前記一対の鍔部６５の各下面には、それぞれ単一の凸部６３が一対形成されている。また、前記鍔部６５の上面６５ａの前方は、図６に示すように、ベース部材６と本体３を組み付けた時に前記第２の当接部３２と当接し、前記本体３の後方を支持する第２の支持部６２として形成されている。 As shown in FIGS. 3 and 4, the height adjusting portion 6 c has a substantially U-shaped cross section, and a pair of flange portions 65 projecting left and right are formed on the top thereof. Here, the height adjusting portion 6c is inclined with respect to the ground at an inclination angle of an angle θ, and the angle θ is less than 45 degrees, preferably 25 degrees. A pair of single convex portions 63 are formed on each lower surface of the pair of flange portions 65. Further, as shown in FIG. 6, the front side of the upper surface 65 a of the flange portion 65 contacts the second contact portion 32 when the base member 6 and the main body 3 are assembled, and supports the rear of the main body 3. The second support portion 62 is formed.

図７乃至図９に示すように、高さ調整部６ｃに設けられている鍔部６５の下方端面には、本願の固定解除ノブとして機能する円筒状のつまみ８０がピン８１により軸支され回動可能に取り付けられている。当該つまみ８０は、図８に示すように、上方に付勢される球体８２が設けられ、対向する高さ調整部６ｃの端面に形成される半円状の溝８２ａ（８２ｂ）と係合する。当該溝８２ａ（８２ｂ）は、図５に示すように、つまみ８０の回転方向に２つ形成されており、２つの溝８２ａ、８２ｂの２点間でつまみ８０の回動範囲が規制されるようになっている。 As shown in FIGS. 7 to 9, a cylindrical knob 80 functioning as a fixing release knob of the present application is pivotally supported by a pin 81 on the lower end surface of the flange portion 65 provided in the height adjusting portion 6c. It is mounted movably. As shown in FIG. 8, the knob 80 is provided with a sphere 82 biased upward, and engages with a semicircular groove 82a (82b) formed on the end face of the opposing height adjusting portion 6c. . As shown in FIG. 5, two grooves 82a (82b) are formed in the rotation direction of the knob 80 so that the rotation range of the knob 80 is restricted between two points of the two grooves 82a and 82b. It has become.

図１０に示すように、当該つまみ８０は、高さ調整部６ｃの下端面に対して水平方向に対向して形成される一対の突起８０ａ、８０ｂを有している。当該突起８０ａ、８０ｂは、一方の溝８２ｂに球体８２が収容されたときに、前記鍔部６５と対向する一方で、他方の溝８２ａに前記球体８２が収容されたときに、前記鍔部６５の内側へと移動する。 As shown in FIG. 10, the knob 80 has a pair of protrusions 80a and 80b formed to face the lower end surface of the height adjusting portion 6c in the horizontal direction. The protrusions 80a and 80b face the flange 65 when the sphere 82 is accommodated in one groove 82b, while the flange 65 when the sphere 82 is accommodated in the other groove 82a. Move to the inside.

前記本体３とベース部材６は、図６に示すようにベース部材６に形成されている鍔部６５に、前記本体３に形成されている収納凹部４ａが摺動可能に挿入されて、前記鍔部６５が前記収納凹部４ａのスライド面３５に当接することにより組み付けられる。また、図３に示すように、３つの凹部３３のうちの任意の１つと前記凸部６３が凹凸係合することにより、図６に示すように凹凸係合部８を形成し、本体３とベース部材６の位置決めがなされる。また、本体３には鍔部６５に対向する位置に弾性体としてのコイルバネ７が設けられている。このコイルバネ７の先端には、ベース部材６の鍔部６５に当接するベース固定用部材７ａが設けられている。このベース固定用部材７ａを介してベース部材６の鍔部６５を本体３のスライド面３５に付勢することで、本体３とベース部材６が凹凸係合し、本体３とベース部材６の固定を維持する。 As shown in FIG. 6, the main body 3 and the base member 6 are slidably inserted into a collar portion 65 formed in the base member 6 so that the housing recess 4a formed in the main body 3 is slid. The part 65 is assembled by coming into contact with the slide surface 35 of the storage recess 4a. Further, as shown in FIG. 3, when any one of the three concave portions 33 and the convex portion 63 engage with the concave and convex portions, the concave and convex engaging portion 8 is formed as shown in FIG. The base member 6 is positioned. The main body 3 is provided with a coil spring 7 as an elastic body at a position facing the flange portion 65. A base fixing member 7 a that comes into contact with the flange portion 65 of the base member 6 is provided at the tip of the coil spring 7. By urging the flange portion 65 of the base member 6 against the slide surface 35 of the main body 3 through the base fixing member 7a, the main body 3 and the base member 6 are engaged with each other to fix the main body 3 and the base member 6. To maintain.

なお、本体３の前方の位置決めは、図３及び図４に示すように、凹凸係合された凹部３３に対応する前記第１の支持部６１のうちの所定の段と前記第１の当接部３１とが当接することによって行われる。またこのとき、本体３が備える前記第２の当接部３２は、ベース部材６が備える前記第２の支持部６２と当接する。したがって、本体３はベース部材６の前記第１の支持部６１と前記第２の支持部６２により支持され、ベース部材６に対する本体３の高さ方向の位置が決定される。 In addition, as shown in FIGS. 3 and 4, the positioning of the front of the main body 3 is performed by the predetermined contact of the first support portion 61 corresponding to the concave portion 33 engaged with the concave and convex portions and the first contact. This is done by contacting the part 31. At this time, the second contact portion 32 included in the main body 3 contacts the second support portion 62 included in the base member 6. Therefore, the main body 3 is supported by the first support portion 61 and the second support portion 62 of the base member 6, and the position of the main body 3 in the height direction with respect to the base member 6 is determined.

ここで、図６に示されるように、第２の支持部６２はベース部材６の略中央から後方に延びる傾斜した鍔部６５の上面６５ａに設けられているため、使用者が芝刈り機１を地面Ｇと垂直方向に押し付けて作業をする際に、押付力に対する反力に鍔部６５に沿う方向の分力が生じる。この鍔部６５に沿う方向の分力はベース部材６を本体３の後方上方へ移動させる方向に作用するため、前記凸部６３の後方面を前記凹部３３の後方面に押圧する力として作用する。 Here, as shown in FIG. 6, since the second support portion 62 is provided on the upper surface 65 a of the inclined hook portion 65 extending rearward from the approximate center of the base member 6, the user can remove the lawn mower 1. Is pressed in the direction perpendicular to the ground G, a component force in the direction along the flange 65 is generated as a reaction force against the pressing force. Since the component force in the direction along the flange 65 acts in a direction to move the base member 6 rearward and upward of the main body 3, it acts as a force for pressing the rear surface of the convex portion 63 against the rear surface of the concave portion 33. .

なお、図３に示すように、前記凹部３３の後方面は底部３３ａから略垂直（７５°乃至９０°）に延びる面３３ｃとして形成されており、前記凸部６３の後方面は頂部６３ａから略垂直（７５°乃至９０°）に延びる面６３ｃとして形成されている。これらの面３３ｃ、６３ｃが互いに当接することにより、前記鍔部６５に沿う方向の分力を効果的に凹凸係合部８の固定に利用することができる。 As shown in FIG. 3, the rear surface of the concave portion 33 is formed as a surface 33c extending substantially perpendicularly (75 ° to 90 °) from the bottom portion 33a, and the rear surface of the convex portion 63 is substantially from the top portion 63a. It is formed as a surface 63c extending vertically (75 ° to 90 °). When these surfaces 33c and 63c come into contact with each other, the component force in the direction along the flange portion 65 can be effectively used for fixing the concave-convex engaging portion 8.

また、前記凹部３３と前記凸部６３が凹凸係合をした状態において、凹部３３の底部３３ａと凸部６３の頂部６３ａの間には間隙８ａが設けられている。この間隙８ａは芝の刈り込みにより生じた塵埃等を凹凸係合部８に介入させずに間隙８ａに捕集することができる。この結果、凹凸係合の固定及び解除の作動を円滑に行うことができる。 Further, in a state where the concave portion 33 and the convex portion 63 are engaged with the concave and convex portions, a gap 8 a is provided between the bottom portion 33 a of the concave portion 33 and the top portion 63 a of the convex portion 63. The gap 8a can collect dust or the like generated by cutting the lawn in the gap 8a without intervening in the concave-convex engaging portion 8. As a result, it is possible to smoothly perform the fixing and releasing operations of the uneven engagement.

このようにして、ベース部材６と本体３とが組み付けられた後、つまみ８０を図７に示すように、固定方向へ回動して一方の溝８２ｂに球体８２が収容された時に、前記鍔部６５の凸部６３と嵌合する凹部３３が形成されたスライド面３５が当該鍔部６５と突起８０ａ、８０ｂとで挟み込まれ、固定される。これによって本体３とベース部材６の凹凸係合を確実なものとし、容易にベース部材６と本体３の固定を維持することが可能である。 After the base member 6 and the main body 3 are assembled in this way, the knob 80 is rotated in the fixing direction as shown in FIG. The slide surface 35 in which the concave portion 33 that fits the convex portion 63 of the portion 65 is formed is sandwiched between the flange portion 65 and the projections 80a and 80b and fixed. As a result, the uneven engagement between the main body 3 and the base member 6 can be ensured, and the base member 6 and the main body 3 can be easily fixed.

一方、つまみ８０を図８に示す解除方向へ回動して他方の溝８２ａに球体８２が収容されたときに、当該突起８０ａ、８０ｂは、鍔部６５よりも内側に移動することで、当該突起８０ａ、８０ｂと鍔部６５とによるスライド面３５の挟み込みを解除する。これによって凹部３３が鍔部６５の凸部６３から外れることができ、ベース部材６と本体３とを分離することが可能になる。 On the other hand, when the knob 80 is rotated in the release direction shown in FIG. 8 and the sphere 82 is accommodated in the other groove 82a, the protrusions 80a and 80b move inward from the flange 65, The pinching of the slide surface 35 by the protrusions 80a and 80b and the flange portion 65 is released. Accordingly, the concave portion 33 can be detached from the convex portion 63 of the flange portion 65, and the base member 6 and the main body 3 can be separated.

すなわち、本実施形態の芝刈り機１は、図７に示すように、つまみ８０の回転によって、本体３とベース部材６とを固定する固定位置と、その固定を解除可能な解除位置と、に切替可能になっている。 That is, the lawnmower 1 according to the present embodiment has a fixed position for fixing the main body 3 and the base member 6 by rotation of the knob 80 and a release position where the fixing can be released as shown in FIG. Switchable.

また、ベース部材６に対する本体３の高さを調整する場合には、図７に示すように、まず、つまみ８０を解除方向に回動し、突起８０ａ、８０ｂと鍔部６５とによるスライド面３５の挟み込みを解除した後、図１１に示すように、ベース部材６に設けられた操作部６ｄを弾性体７の付勢力に対向して本体３の収納凹部４ａの内（矢印方向Ｆ）に向けて持ち上げて、前記凸部６３と前記凹部３３の係合を解除するとともに、ベース部材６の前方を下方に下げることで、第１の当接部３１と第１の支持部６１との当接を解除する。さらに、ベース部材６の操作部６ｄを矢印方向Ｆに持ち上げたままベース部材６の鍔部６５の下面６５ｂを本体３に設けられた収納凹部４ａに形成したスライド面３５に沿って摺動させることで、凸部６３を別の凹部３３まで移動させ、その後、ベース部材６から手を離すと、コイルバネ７の付勢力によりベース固定用部材７ａを介して、ベース部材６の凸部６３が本体３の凹部３３に付勢され、ベース部材６に対する本体３の高さが調整される。そして、つまみ８０を固定位置に回動して突起８０ａ、８０ｂと鍔部６５とでスライド面３５を挟み込み、本体３とベース部材６の凹凸係合を確実なものとし本体３とベース部材６とを固定すれば良い。 When adjusting the height of the main body 3 with respect to the base member 6, first, as shown in FIG. 7, the knob 80 is first rotated in the release direction, and the slide surface 35 formed by the protrusions 80 a and 80 b and the flange portion 65. 11, the operation portion 6d provided on the base member 6 faces the inside of the housing recess 4a (in the arrow direction F) of the main body 3 so as to oppose the urging force of the elastic body 7, as shown in FIG. The first contact portion 31 and the first support portion 61 are brought into contact with each other by releasing the engagement between the convex portion 63 and the concave portion 33 and lowering the front of the base member 6 downward. Is released. Further, the lower surface 65b of the collar portion 65 of the base member 6 is slid along the slide surface 35 formed in the storage recess 4a provided in the main body 3 while the operation portion 6d of the base member 6 is lifted in the arrow direction F. Then, when the convex portion 63 is moved to another concave portion 33 and then released from the base member 6, the convex portion 63 of the base member 6 is moved through the base fixing member 7 a by the biasing force of the coil spring 7. The height of the main body 3 relative to the base member 6 is adjusted. Then, the knob 80 is rotated to a fixed position so that the slide surface 35 is sandwiched between the protrusions 80a and 80b and the flange portion 65, and the main body 3 and the base member 6 are securely engaged with each other. Can be fixed.

なお、本体３の前方の位置決めについては、ベース部材６は合成樹脂材等からなる剛体であるため、後方の位置が凹凸係合により固定されると、摺動面６ａはブレード２の面と略平行な位置に復帰するため、第１の当接部３１は、前記凹凸係合した凹部３３に対応する第１の支持部６１の所定の段に当接することができる。 Regarding the front positioning of the main body 3, since the base member 6 is a rigid body made of a synthetic resin material or the like, the sliding surface 6a is substantially the same as the surface of the blade 2 when the rear position is fixed by uneven engagement. In order to return to the parallel position, the first contact portion 31 can contact a predetermined step of the first support portion 61 corresponding to the concave portion 33 engaged with the concave and convex portions.

また、第１の当接部３１と当接する階段状の第１の支持部６１の段の段差と凹凸係合部８を構成する複数の凹部３３のそれぞれの段差は、同じ高さとなるように形成されており、本体３を凹凸係合により位置決めするときに、地面Ｇに対して略垂直方向に本体３の高さを調整できるようになっている。 Further, the step of the step-like first support portion 61 that contacts the first contact portion 31 and the steps of the plurality of recesses 33 constituting the concave-convex engagement portion 8 have the same height. The height of the main body 3 can be adjusted in a direction substantially perpendicular to the ground G when the main body 3 is positioned by concave-convex engagement.

また、前記凹部３３と前記凸部６３の前方面にはそれぞれ前方方向へ傾く傾斜面３３ｂ、６３ｂが形成されている。この傾斜面３３ｂ、６３ｂは、凹凸係合の解除後にベース部材６を摺動させる際に、凹部３３と凸部６３が相互に干渉することを防止することができ、より円滑に調整操作をすることができる。 In addition, inclined surfaces 33b and 63b are formed on the front surfaces of the concave portion 33 and the convex portion 63, respectively, which are inclined in the forward direction. The inclined surfaces 33b and 63b can prevent the concave portion 33 and the convex portion 63 from interfering with each other when the base member 6 is slid after the concave / convex engagement is released, and the adjustment operation is performed more smoothly. be able to.

このように、本実施形態に係る芝刈り機１は、ベース部材６と本体３の取り付け又は取り外しを容易にするためのつまみ８０が設けられ、当該つまみ８０には突起８０ａ、８０ｂが形成されており、当該つまみ８０を固定位置と解除位置に切り替えるように回動することで当該突起８０ａ、８０ｂによって凹凸係合部８の固定又は解除を行うことが可能となっている。よって、つまみ８０の回動のみで、刈り込み高さＴの調整のためのベース部材６と本体３の固定又は解除を容易に行うことが可能である。また、本体３をベース本体６に支持する支持部を前後に設けたため、水平状態を維持したまま刈り込み高さＴの調整を行うことができる。 As described above, the lawnmower 1 according to the present embodiment is provided with the knob 80 for facilitating the attachment or removal of the base member 6 and the main body 3, and the knob 80 is formed with protrusions 80 a and 80 b. Thus, by rotating the knob 80 so as to switch between the fixed position and the release position, the projections 80a and 80b can fix or release the concave / convex engaging portion 8. Accordingly, it is possible to easily fix or release the base member 6 and the main body 3 for adjusting the trimming height T only by turning the knob 80. Moreover, since the support part which supports the main body 3 to the base main body 6 was provided in the front and back, the trimming height T can be adjusted while maintaining a horizontal state.

また、本実施形態に係る芝刈り機１のベース部材６の後方には、操作部６ｃが後方へ突出して設けられており、つまみ８０を固定位置から解除位置に回動し、当該操作部６ｄを上方へ持ち上げるだけで、刈り込み高さＴを調整する際における本体３とベース部材６の凹凸係合の解除を行うことができる。よって、刈り込み高さＴの調整のためのベース部材６と本体３の解除を容易に行うことが可能である。 In addition, an operation portion 6c is provided behind the base member 6 of the lawn mower 1 according to the present embodiment so as to protrude rearward, and the knob 80 is rotated from the fixed position to the release position, and the operation portion 6d. It is possible to release the concavo-convex engagement between the main body 3 and the base member 6 when the trimming height T is adjusted simply by lifting up. Therefore, the base member 6 and the main body 3 for adjusting the trimming height T can be easily released.

このように本実施形態の芝刈り機１は、つまみ８０を固定位置から解除位置に回動し、ベース部材６の操作部６ｄを本体３の収納凹部４ａの内に向けて持ち上げて、本体３とベース部材６の凹凸係合を解除するだけで、地面Ｇとブレード２の面との間の略平行状態を維持しながら、ブレード２と地面Ｇの距離を調整し、再度、つまみ８０を固定位置に回動することで、刈り込み高さＴを容易に調整することが可能となっている。 As described above, the lawnmower 1 of the present embodiment rotates the knob 80 from the fixed position to the release position, lifts the operation portion 6d of the base member 6 into the housing recess 4a of the main body 3, and the main body 3 The base member 6 is simply disengaged, and the distance between the blade 2 and the ground G is adjusted while the substantially parallel state between the ground G and the surface of the blade 2 is maintained, and the knob 80 is fixed again. By turning to the position, the trimming height T can be easily adjusted.

また、ベース部材６は、上面に大きな集芝部７０を備え、後方が略双胴艇の舳先の形状に形成されて前記後方端部の集芝部７０が左右に区分けされている。よって、芝を多く集められ、芝を廃棄する頻度を少なくできる。また、ベース部材６の後端を略双胴艇の舳先の形状としたため、芝刈り機１を後方に引く際に、当該ベース部材６が芝に引っかかることなく滑らかに後退させることができる。 Further, the base member 6 has a large grass collection portion 70 on the upper surface, the rear is formed substantially in the shape of the tip of a catamaran, and the grass collection portion 70 at the rear end is divided into left and right. Therefore, a lot of turf can be collected and the frequency of discarding turf can be reduced. In addition, since the rear end of the base member 6 is shaped like the tip of a catamaran, when the lawnmower 1 is pulled backward, the base member 6 can be smoothly retracted without being caught by the grass.

また、本実施形態の芝刈り機１のベース部材６は、本体３の全長よりも長く形成されている。よって、本体３が安定し、本実施形態の芝刈り機１のように操作ハンドル部２７が本体３から離れている場合であっても安定して芝刈りを行うことができる。 Further, the base member 6 of the lawn mower 1 of the present embodiment is formed longer than the entire length of the main body 3. Therefore, even if the main body 3 is stable and the operation handle portion 27 is separated from the main body 3 as in the lawn mower 1 of the present embodiment, the lawn mowing can be performed stably.

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各実施形態に記載の範囲には限定されない。例えば、芝刈り機１の前方の位置決めを容易に行うため、当該ベース部材６に形成された第１の支持部６１は、複数の窪みによって形成されても構わない。このようにすれば、第１の当接部３１は、位置決めの際にこの窪みに嵌り込むこととなり、容易、且つ確実に前方の位置決めを行うことができる。 As mentioned above, although preferred embodiment of this invention was described, the technical scope of this invention is not limited to the range as described in said each embodiment. For example, in order to easily position the front of the lawn mower 1, the first support portion 61 formed on the base member 6 may be formed by a plurality of depressions. If it does in this way, the 1st contact part 31 will fit in this hollow in the case of positioning, and can perform front positioning easily and reliably.

また、第１の実施形態で説明したブレード２は、一対の可動刃（上刃２ａ及び下刃２ｂ）を備えているが、下刃２ｂを固定し、上刃２ａのみが下刃２ｂの上面を揺動するようにしても構わない。 The blade 2 described in the first embodiment includes a pair of movable blades (upper blade 2a and lower blade 2b). The lower blade 2b is fixed, and only the upper blade 2a is the upper surface of the lower blade 2b. May be swung.

また、本発明の第１の実施形態に係る芝刈り機１において、本体３に一対の単一の凸部６３を形成し、ベース部材６に複数の凹部３３を形成しても構わない。 In the lawn mower 1 according to the first embodiment of the present invention, a pair of single convex portions 63 may be formed on the main body 3, and a plurality of concave portions 33 may be formed on the base member 6.

さらにまた、本発明の実施形態に係る芝刈り機１において、把持部４は、本体３に別部材として取り付けられるハンドルとしても構わないし、略Ｃ字形状でも構わない。 Furthermore, in the lawn mower 1 according to the embodiment of the present invention, the grip portion 4 may be a handle attached as a separate member to the main body 3 or may be substantially C-shaped.

さらにまた、本実施形態の芝刈り機１は、ポールバリカンに適用したものであるが、ジョイント部２５が取り外された一般的な芝刈り機にも適用可能である。 Furthermore, although the lawn mower 1 of the present embodiment is applied to a pole clipper, it can also be applied to a general lawn mower from which the joint portion 25 has been removed.

さらにまた、本実施形態に係る芝刈り機１において、コイルバネ７はベース部材６に配置しても構わないし、コイルバネ７はゴムでも構わないし、無くても構わない。その様な変更又は改良を加えた形態も本発明の技術的範囲に含まれうることが、特許請求の範囲の記載から明らかである。 Furthermore, in the lawnmower 1 according to the present embodiment, the coil spring 7 may be disposed on the base member 6, and the coil spring 7 may be rubber or may be omitted. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

本実施形態に係る芝刈り機の部分断面を含む全体構造を示す正面図である。It is a front view which shows the whole structure containing the partial cross section of the lawn mower which concerns on this embodiment. 芝刈り機の平面図である。It is a top view of a lawn mower. 芝刈り機の本体とベース部材の一部断面正面図である。It is a partial cross section front view of the main body and base member of a lawn mower. ベース部材の平面斜視図である。It is a top perspective view of a base member. ベース部材の底面斜視図である。It is a bottom perspective view of a base member. 本体とベース部材の組付状態を示す一部断面正面図である。It is a partial cross section front view which shows the assembly | attachment state of a main body and a base member. 固定解除ノブ近傍の拡大図である。It is an enlarged view of the fixing release knob vicinity. 固定解除ノブの縦断面図である。It is a longitudinal cross-sectional view of a fixation release knob. 固定解除ノブがベース部材に取付けられた時の簡易構成図である。It is a simple block diagram when the fixation release knob is attached to the base member. 図９のＡ−Ａ断面図である。It is AA sectional drawing of FIG. 高さ調整機構の動作を説明するための一部断面正面図である。It is a partial cross section front view for demonstrating operation | movement of a height adjustment mechanism.

Explanation of symbols

１芝刈り機
２ブレード
３本体
３ａハウジング
４把持部
６ベース部材
６ａ摺動面
６ｄ操作部
７コイルバネ（弾性体）
３１第１の当接部
３２第２の当接部
３３凹部
３５スライド面
６１第１の支持部
６２第２の支持部
６３凸部
６５鍔部
７０集芝部
Ｆ押圧方向
８０つまみ
８０ａ、８０ｂ突起 DESCRIPTION OF SYMBOLS 1 Lawn mower 2 Blade 3 Main body 3a Housing 4 Holding part 6 Base member 6a Sliding surface 6d Operation part 7 Coil spring (elastic body)
31 1st contact part 32 2nd contact part 33 Concave part 35 Sliding surface 61 1st support part 62 2nd support part 63 Convex part 65 Gutter part 70 Collection lawn part F Press direction 80 Knob 80a, 80b Protrusion

Claims

A body with a blade;
A base member attached to the main body and having a sliding surface in contact with the object to be trimmed;
The surface of the blade is arranged in a direction substantially parallel to the sliding surface of the base member;
A lawnmower in which the sliding surface of the base member is adjustable in the distance from the blade while maintaining a substantially parallel state with respect to the surface of the blade,
An uneven engagement portion for fixing the base member to the main body;
The uneven engagement portion is
A plurality of recesses formed in either the main body or the base member;
A pair of convex portions formed on either the base member or the main body, and
The base member includes switching means for maintaining or releasing the fixing of the concave and convex portions,
The switching means includes a fixing release knob that is rotatably attached to the base member,
The unlocking knob is
Having a protrusion for fixing or releasing the concave portion and the convex portion,
The protrusion is
A lawnmower that is movable to a fixing position for fixing the concave portion and the convex portion and a release position for releasing the fixing of the concave portion and the convex portion by rotating the fixing release knob.

The lawn mower according to claim 1,
The main body includes a first abutting portion on the lower front side of the main body, and a second abutting portion between the first abutting portion and the concave-convex engaging portion,
The base member has a first support portion that comes into contact with the first contact portion, and a second contact portion on a surface facing the main body that extends obliquely upward from a rear end of the sliding surface. A lawnmower comprising a second support portion in contact with the lawn mower.

The lawn mower according to claim 1 or 2,
Provided behind the base member is an operation part for releasing the fixation between the main body and the base member,
A lawn mower characterized in that a rear end of the operation portion protrudes rearward from a rear end portion of the main body.

The lawnmower according to any one of claims 1 to 3,
The base member includes a grass collection portion extending from the front to the rear end portion, and the rear portion is formed substantially in the shape of a tip of a catamaran, and the grass collection portion at the rear end portion is divided into left and right. Lawn mower characterized by that.

The lawnmower according to any one of claims 1 to 4,
The lawn mower characterized in that the base member is formed longer than the entire length of the main body.