JPH0623227Y2 - Head structure of flexible filament mower - Google Patents

Description

【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、ヘツド内部のスプールに巻回された可撓性フ
イラメント（以下、単に「ナイロンコード」という。）
を所定長さヘツドから引き出し、ヘツドを回転させその
外周で一体に回転させられるナイロンコードにより草刈
りを行う草刈機のヘツド構造に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a flexible filament wound around a spool inside a head (hereinafter, simply referred to as “nylon cord”).
The present invention relates to a head structure of a mower, which draws grass from a head for a predetermined length, rotates the head, and cuts grass with a nylon cord that is integrally rotated around the head.

〔従来の技術〕[Conventional technology]

従来、可撓性フイラメント式草刈機としては、特公昭５
９−２２４８４号公報に記載された発明及び特公昭６０
−５３５６２号公報に記載された発明等が提供された。Conventionally, as a flexible filament type mower, Japanese Patent Publication Sho 5
Invention described in 9-22484 and Japanese Examined Patent Publication No. 60
The invention described in Japanese Patent No. 53562/1993 is provided.

前者の発明は一般にはフルオートタイプと言われるもの
で、例えば、ナイロンコードが摩耗あるいは破断により
短縮されると、原動機の負荷が減少し、逆に回転速度が
増大し、その結果ヘツド内部に設けた摺動部材が増大し
た遠心力の働きでヘツドの外周方向に移動させられ、該
摺動部材の働きで出力軸側とスプール側との結合が解除
され、スプールがフリーとなつて遠心力で引つ張られて
ナイロンコードが繰出されるものであつた。そして、所
定長さとなると原動機の負荷が増加し、逆に回転速度が
減少し、その結果ヘツド内部の摺動部材がスプリングに
より所定の位置に復帰させられ、出力軸側とスプール側
とが結合し、ナイロンコードの繰出しが中止されるもの
であつた。The former invention is generally called a full-auto type, and for example, when the nylon cord is shortened due to wear or breakage, the load on the prime mover decreases, and conversely the rotation speed increases, and as a result, it is installed inside the head. The sliding member is moved in the outer peripheral direction of the head by the action of the increased centrifugal force, the action of the sliding member releases the coupling between the output shaft side and the spool side, and the spool becomes free and the centrifugal force is exerted. The nylon cord was pulled out and fed out. Then, when the length becomes the predetermined length, the load of the prime mover increases, and conversely the rotation speed decreases, and as a result, the sliding member inside the head is returned to the predetermined position by the spring, and the output shaft side and the spool side are connected. The feeding of nylon cord was stopped.

また、前記後者の発明は一般にはセミオートタイプと言
われるもので、出力軸側に対してナイロンコードを巻回
したスプール側を所定ストロークで出力軸の軸線方向に
沿つて往復動させると該スプール側と前記出力軸側間が
若干範囲の前記軸周りの回動と結合を繰返してナイロン
コードが繰出されるものであつた。In addition, the latter invention is generally called a semi-auto type, and when the spool side around which the nylon cord is wound around the output shaft side is reciprocated along the axial direction of the output shaft with a predetermined stroke, the spool side is moved. The nylon cord is fed out by repeating rotation and coupling around the shaft in a slight range between the output shaft side and the output shaft side.

〔考案が解決しようとする課題〕[Problems to be solved by the device]

前記従来の発明は、いずれも、ナイロンコードの繰出し
を自動的又は半自動的に容易に行えるものの、構造が複
雑でコストアツプを免れない欠点があつた。また、ナイ
ロンコードが順次繰出されて最終的になくなつた際には
新たなナイロンコードを補充する必要があるが、前記従
来の発明では、構造が複雑であつたのでスプールの取外
し等の分解作業や組立作業に手数を要し、ナイロンコー
ドの補充作業に手数を要する欠点があつた。In each of the above-mentioned conventional inventions, the feeding of the nylon cord can be easily performed automatically or semi-automatically, but it has a drawback that the structure is complicated and the cost is inevitable. Further, when the nylon cords are sequentially fed out and finally lost, it is necessary to replenish the new nylon cords. However, in the above-mentioned conventional invention, the structure is complicated, and therefore disassembly work such as spool removal is performed. There is a drawback that the assembly work and the nylon cord replenishment work are troublesome.

かかる事情に鑑み、本考案は、構造が極めて簡単で安価
であるとともに、ナイロンコードの繰出し及び補充を容
易に行うことができる可撓性フイラメント式草刈機のヘ
ツド構造を提供しようとするものである。In view of such circumstances, the present invention intends to provide a head structure of a flexible filament mower that has an extremely simple structure and is inexpensive, and that can easily feed and replenish nylon cords. .

〔課題を解決するための手段〕[Means for Solving the Problems]

前記課題を解決するため、本考案は、出力軸側に固定さ
れたハウジングと、可撓性フイラメントが巻回されたス
プールと、前記ハウジングにスプールを軸方向及び回転
方向に対して係止するための係合突起を設けた支持部材
とを備えた構成としたものである。In order to solve the above problems, the present invention provides a housing fixed to an output shaft side, a spool around which a flexible filament is wound, and a spool that is locked to the housing in the axial direction and the rotation direction. And a supporting member provided with the engaging projections.

そして、前記スプールの筒状部の内側面に、その円周方
向に渡つて複数の係合受部を形成し、前記ハウジングに
嵌合した際の筒状部の径方向に揺動自在で該筒状部の内
側面に向かう向きに付勢された複数の係合突起を前記ハ
ウジング側に支持し、該係合突起の揺動状態に応じて該
係合突起と前記係合受部とを係脱自在ならしめた構成と
したものである。A plurality of engagement receiving portions are formed on the inner surface of the tubular portion of the spool so as to extend in the circumferential direction, and the engagement receiving portion is swingable in the radial direction of the tubular portion when fitted into the housing. A plurality of engaging projections biased toward the inner surface of the tubular portion are supported on the housing side, and the engaging projections and the engaging receiving portions are formed according to the swinging state of the engaging projections. The structure is such that it can be freely engaged and disengaged.

また、前記スプールの筒状部の内側面における前記各係
合受部の上部間に円周方向に沿つて上側が小径で下側が
大径の段部を形成しておいてもよい。Further, a stepped portion having a small diameter on the upper side and a large diameter on the lower side may be formed along the circumferential direction between the upper portions of the engagement receiving portions on the inner surface of the tubular portion of the spool along the circumferential direction.

〔作用〕[Action]

本考案によれば、スプールの着脱を極めて簡単に行うこ
とができる。According to the present invention, the spool can be attached and detached very easily.

すなわち、スプールの装着時には、ハウジングの下方か
らスプールを嵌合すれば、支持部材の係合突起が、スプ
ールのガイドスロープに接触し、該支持部材の両側片の
係合突起が一旦内側（ハウジングの内筒の中心軸線側）
に揺動させられ、該スプールをハウジングに対して回転
させると、各係合突起はハウジングの内筒及びスプール
の筒状部の内側面に向う向きに付勢されているので、係
合突起と係合受部の位置が一致したときに係合突起がハ
ウジングの内筒の切欠凹部を通してスプールの係合受部
に自動的に係合し、スプールがハウジングに組み付けら
れる。そして、スプールの取外し時には、支持部材の両
側片の下端を指でつまんで各係合突起を内側に揺動させ
ると、該係合突起と係合受部との係合が外れ、スプール
が外れる。That is, when the spool is mounted, if the spool is fitted from below the housing, the engagement protrusions of the support member come into contact with the guide slopes of the spool, and the engagement protrusions of both side pieces of the support member temporarily move to the inside (the housing (Center axis side of inner cylinder)
When the spool is rotated with respect to the housing, the engaging projections are urged toward the inner cylinder of the housing and the inner side surface of the cylindrical portion of the spool. When the positions of the engagement receiving portions coincide with each other, the engagement projections automatically engage with the engagement receiving portions of the spool through the cutout recesses of the inner cylinder of the housing, and the spool is assembled to the housing. When the spool is removed, the lower ends of both side pieces of the support member are pinched with fingers and the engaging projections are swung inward, so that the engaging projections are disengaged from the engaging receiving portions, and the spool is disengaged. .

そして、ナイロンコードを繰り出す場合には、一旦前述
の如くしてハウジングとスプールの係合を解除し、該ス
プールをハウジングに対してナイロンコードを繰出す方
向に１回転又は前記複数の係合突起と前記係合受部との
位置関係で定まる所定角度だけ回転させた後、前述の如
くしてハウジングに組付ければよいものである。Then, when the nylon cord is paid out, the engagement between the housing and the spool is temporarily released as described above, and the spool is rotated once in the direction in which the nylon cord is paid out with respect to the housing or the plurality of engaging projections are provided. After being rotated by a predetermined angle determined by the positional relationship with the engagement receiving portion, it may be assembled to the housing as described above.

なお、スプールの筒状部の内側面における各係合受部の
上部間に円周方向に沿つて上側が小径で下側が大径の段
部を形成しておけば、ハウジングからスプールが外れる
ことなく、ナイロンコードを繰り出すことができる。す
なわち、各係合受部を内側に少し揺動させて係合突起と
係合受部との係合を解除し、スプールを少し回転させれ
ば、係合突起が前記段部に係合し、スプールは回転方向
にフリーとなるが下方には抜け落ちない。この状態にお
いて、ナイロンコードを引き出せば、スプールが自動的
に回転し、次の係合受部と係合突起が一致したときに係
合突起が支持部材の弾性により係合受部に自動的に係合
し、ナイロンコードの繰出し作業が完了する。なお、ナ
イロンコードはスプールに巻き込まれた時に残留歪が生
じることとあわせて草刈中に繰出し方向に張力を受けて
残留歪が生じている場合が多いので、通常は作業者自ら
が前述の如くスプールを少し回転させなくても、係合突
起と係合受部との係合を解除するとスプールが自動的に
少し回転して係合突起が段部に係合することになるもの
である。If a step with a small diameter on the upper side and a large diameter on the lower side is formed along the circumferential direction between the upper portions of the engagement receiving portions on the inner surface of the tubular portion of the spool, the spool will come off from the housing. Without, you can feed the nylon cord. That is, each engagement receiving portion is slightly swung inward to release the engagement between the engagement protrusion and the engagement receiving portion, and the spool is slightly rotated, so that the engagement protrusion engages with the step portion. , The spool is free in the direction of rotation but does not fall out. In this state, pulling out the nylon cord causes the spool to rotate automatically, and when the next engagement receiving portion and the engagement protrusion match, the engagement protrusion automatically moves to the engagement receiving portion due to the elasticity of the support member. Engage, and the work of feeding out the nylon cord is completed. Nylon cords often have residual strain when wound on the spool, and in addition to the residual strain that is generated by tension in the feeding direction during mowing, the operator usually uses the spool as described above. Even if is not rotated a little, when the engagement between the engagement protrusion and the engagement receiving portion is released, the spool automatically rotates a little and the engagement protrusion engages with the stepped portion.

本考案では、このようにしてナイロンコードの繰出し作
業が手動で行われるので、前記従来の発明の如くナイロ
ンコードの繰出しが自動的又は半自動的に行われる場合
に比べて多少の手数を要するものの、ナイロンコードの
繰出し作業は簡単である。In the present invention, since the work of feeding the nylon cord is manually performed in this manner, although it requires some trouble as compared with the case where the feeding of the nylon cord is automatically or semi-automatically performed as in the conventional invention, The work of feeding the nylon cord is easy.

また、本考案では、前述の如くスプールの着脱が極めて
容易であるので、ナイロンコードがなくなつた際の新た
なナイロンコードの補充も極めて容易である。Further, in the present invention, since the spool can be attached and detached very easily as described above, it is very easy to replenish a new nylon cord when the nylon cord is lost.

さらに、本考案の構成要素は、基本的には、ハウジング
とスプール及び係合突起（を有する支持部材）だけであ
るため、構成が簡単で安価となる。Further, since the constituent elements of the present invention are basically only the housing, the spool, and (the supporting member having the engaging projection), the structure is simple and inexpensive.

〔実施例〕〔Example〕

以下、図面に示す実施例に基づいて本考案を説明する。 The present invention will be described below based on the embodiments shown in the drawings.

第１図は本考案に係る可撓性フイラメント式草刈機のヘ
ツド(a)の縦断面図、第２図は第１図におけるII−II矢
視図である。なお、第１図中右側と左側とでは係合突起
(11)の異なる揺動状態を示してある。1 is a longitudinal sectional view of a head (a) of a flexible filament type mower according to the present invention, and FIG. 2 is a view taken along the line II-II in FIG. It should be noted that the engagement protrusion is on the right side and the left side in FIG.
The different rocking states of (11) are shown.

前記ヘツド(a)は、出力軸(15)側に固定されたハウジン
グ(1)と、該ハウジング(1)に下方から嵌合され、可撓性
フイラメントたるナイロンコード(2)が巻回されたスプ
ール(3)及び係合突起(11)を備えた構成とされている。
なお、可撓性フイラメントはナイロンコード(2)に限定
されるものではない。The head (a) is fitted into the housing (1) fixed to the output shaft (15) side and the housing (1) from below, and a nylon cord (2) as a flexible filament is wound. The spool (3) and the engagement protrusion (11) are provided.
The flexible filament is not limited to the nylon cord (2).

図面実施例の場合、前記ハウジング(1)は、駆動軸（図
示せず）を入力軸としたギアボツクス(4)の出力軸(5)に
ナツト(6)止めされており、駆動軸の回転に従つて出力
軸(5)と一体に回転するようになつている。In the case of the embodiment shown in the drawings, the housing (1) is fixed to the output shaft (5) of the gearbox (4) with the drive shaft (not shown) as the input shaft by nuts (6) to prevent the rotation of the drive shaft. Therefore, it is designed to rotate integrally with the output shaft (5).

また、前記ハウジング(1)は、下方から前記スプール(3)
を嵌合できるように構成されている。すなわち、図面実
施例の場合、ハウジング(1)は下方が開口したカツプ状
に構成され、その内部の中央に内筒(7)が形成され、該
内筒(7)の下端部の両側対向部には、後に述べる支持部
材(12)の係合突起(11)が係合する切欠凹部(14)が設けら
れている。In addition, the housing (1) is the spool (3) from below.
Are configured so that they can be fitted together. That is, in the case of the embodiment shown in the drawings, the housing (1) is formed in a cup shape with an opening at the bottom, and an inner cylinder (7) is formed in the center of the inside thereof, and the inner cylinder (7) has a lower end portion facing both sides. A notch concave portion (14) with which an engagement protrusion (11) of a support member (12) described later engages is provided in the.

そして、前記スプール(3)の筒状部(8)の上部が開口され
て、該開口部の上端内周にガイドスロープ(15)が構成さ
れ、さらに、筒状部(8)がハウジング(1)の内筒(7)の外
側に嵌合されるように構成されている。The upper portion of the tubular portion (8) of the spool (3) is opened to form a guide slope (15) on the inner circumference of the upper end of the opening portion, and the tubular portion (8) is attached to the housing (1). It is configured to be fitted to the outer side of the inner cylinder (7).

そして、該嵌合時には、スプール(3)のナイロンコード
(2)巻回部分はハウジング(1)の内部に位置するようにな
つている。なお、前記スプール(3)の筒状部(8)の下部も
開口されている。And at the time of the fitting, the nylon cord of the spool (3)
(2) The wound portion is located inside the housing (1). The lower portion of the tubular portion (8) of the spool (3) is also open.

そして、本考案では、前記スプール(3)の筒状部(8)の内
側面にその円周方向に渡つて複数の係合受部(9)が形成
される。Further, in the present invention, a plurality of engagement receiving portions (9) are formed on the inner surface of the cylindrical portion (8) of the spool (3) in the circumferential direction.

図面実施例の場合、該係合受部(9)として孔が形成さ
れ、スプール(3)の筒状部(8)の中心軸線に対して90゜ず
つの位置をなすように４つ形成されている。もつとも、
前記係合受部(9)としては、孔ではなく凹所を形成して
もよい。In the case of the embodiment shown in the drawings, holes are formed as the engagement receiving portions (9), and four holes are formed so as to be located at 90 ° intervals with respect to the central axis of the cylindrical portion (8) of the spool (3). ing. With
The engagement receiving portion (9) may be formed with a recess instead of a hole.

また、図面実施例の場合、前記スプール(3)の筒状部(8)
の内側面における各係合受部(9)の上部間に円周方向に
沿つて上側が小径で下側が大径の段部(10)が形成されて
いる。本考案では、該段部(10)は必ずしも必要ではない
が、該段部(10)を形成しておけば、後述の如くナイロン
コード(2)の繰り出し作業が一段と簡単になる。Further, in the case of the illustrated embodiment, the cylindrical portion (8) of the spool (3)
A step portion (10) having a small diameter on the upper side and a large diameter on the lower side is formed along the circumferential direction between the upper portions of the engagement receiving portions (9) on the inner surface of the. In the present invention, the step portion (10) is not always necessary, but if the step portion (10) is formed, the work of feeding out the nylon cord (2) will be further simplified as described later.

さらに、本考案では、前記ハウジング(1)に嵌合した
際、該ハウジング(1)の内筒(7)及びスプール(3)の筒状
部(8)の径方向に揺動自在でハウジング(1)の内筒(7)及
びスプール(3)の筒状部(8)の内側面に向かう向きに付勢
された複数の係合突起(11)が前記ハウジング(1)に支持
され、該係合突起(11)の揺動状態に応じて該係合突起(1
1)と前記係合受野(9)とが係脱自在とされる。Further, according to the present invention, when fitted into the housing (1), the housing (1) is swingable in the radial direction of the inner cylinder (7) and the tubular portion (8) of the spool (3). The inner cylinder (7) of (1) and a plurality of engaging projections (11) biased toward the inner surface of the tubular portion (8) of the spool (3) are supported by the housing (1), Depending on the swinging state of the engaging protrusion (11), the engaging protrusion (1
1) and the engagement receiving field (9) can be engaged and disengaged.

図面実施例の場合、合成樹脂で一体成形された支持部材
(12)の中央片(12a)が前記ナツト(6)によりハウジング
(1)の内筒(7)内に共締めされ、該支持部材(12)の両側片
(12b)における前記内筒(7)の下端部に設けた切欠凹部(1
4)と対向する位置にそれぞれ前記係合突起(11)が一体成
形されている。そして、前記支持部材(12)の両側片(12
b)は弾性を有しており、この弾性によつて、前記各係合
突起(11)は、ハウジング(1)に嵌合した際、該ハウジン
グ(1)の内筒(7)及びスプール(3)の筒状部(8)の径方向に
揺動自在で、ハウジング(1)の内筒(7)及びスプール(3)
の筒状部(8)の内側面に向かう向きに付勢されている。In the case of the embodiment shown in the drawings, the support member is integrally molded of synthetic resin.
The central piece (12a) of (12) is the housing by the nut (6).
Both sides of the support member (12) are fastened together in the inner cylinder (7) of (1).
The cutout recess (1) provided at the lower end of the inner cylinder (7) in (12b).
The engaging projections (11) are integrally formed at positions facing the (4). Then, both side pieces (12
b) has elasticity, and by this elasticity, when the engaging projections (11) are fitted into the housing (1), the inner cylinder (7) and the spool (7) of the housing (1) are It is swingable in the radial direction of the tubular part (8) of 3), and the inner cylinder (7) and spool (3) of the housing (1).
Is urged toward the inner surface of the tubular portion (8).

なお、前記係合受部(9)、切欠凹部(14)及び係合突起(1
1)の数は特に限定されるものではない。ただし、係合受
部(9)の数によつて、すなわち、各係合受部(9)間の角度
によつてナイロンコード(2)の繰出しピツチが決定され
るので、これを考慮して係合受部(9)の数が定められ
る。Incidentally, the engagement receiving portion (9), the notch recess (14) and the engagement protrusion (1
The number of 1) is not particularly limited. However, the feeding pitch of the nylon cord (2) is determined by the number of the engagement receiving portions (9), that is, the angle between the engagement receiving portions (9). The number of engagement receiving portions (9) is determined.

なお、図中、(13)はハウジング(1)の外周面に設けられ
たナイロンコード(2)の導出口で、該導出口(13)は通常
は複数設けられ、ナイロンコード(2)が複数本引き出さ
れる。In the figure, (13) is a lead-out port for the nylon cord (2) provided on the outer peripheral surface of the housing (1). The book is pulled out.

前記構成の本考案によれば、スプール(3)の着脱を極め
て簡単に行うことができる。According to the present invention having the above structure, the spool (3) can be attached and detached very easily.

すなわち、スプール(3)の装着時にはハウジング(1)の下
方からスプール(3)を嵌合すれば、支持部材(12)の係合
突起(11)がスプール(3)のガイドスロープ(15)に接触
し、該支持部材(12)の両側片(12b)の各係合突起(11)が
一旦内側（内筒(7)の中心軸線側）に揺動させられ、該
スプール(3)をハウジング(1)に対して最大でも90°回転
させると、各係合突起(11)はハウジング(1)の内筒(7)及
びスプール(3)の筒状部(8)の内側面に向う向きに付勢さ
れているので、係合突起(11)と係合受部(9)の位置が一
致したときに、第１図中左側で示す如く、係合突起(11)
が、ハウジング(1)の内筒(7)の切欠凹部(14)を通してス
プール(3)の係合受部(9)に自動的に係合し、スプール
(3)がハウジング(1)に組み付けられる。そして、スプー
ル(3)の取外し時には、支持部材(12)の両側片(12)の下
端を指でつまんで各係合突起(11)を内側に揺動させる
と、係合突起(11)と係合受部(9)との係合が外れ、スプ
ール(3)が外れる。That is, when the spool (3) is mounted, if the spool (3) is fitted from below the housing (1), the engaging protrusions (11) of the support member (12) become the guide slopes (15) of the spool (3). Upon contact, the engaging protrusions (11) of both side pieces (12b) of the supporting member (12) are once swung inward (toward the central axis of the inner cylinder (7)), and the spool (3) is moved to the housing. When rotated at a maximum of 90 ° with respect to (1), each engagement protrusion (11) faces the inner cylinder (7) of the housing (1) and the inner surface of the cylindrical part (8) of the spool (3). When the positions of the engaging projection (11) and the engaging receiving portion (9) coincide with each other, as shown on the left side in FIG. 1, the engaging projection (11)
Automatically engages with the engagement receiving portion (9) of the spool (3) through the cutout recess (14) of the inner cylinder (7) of the housing (1),
(3) is assembled to the housing (1). When the spool (3) is removed, the lower ends of both side pieces (12) of the support member (12) are pinched with fingers and the engaging protrusions (11) are swung inward, whereby the engaging protrusions (11) are removed. The engagement with the engagement receiving portion (9) is disengaged, and the spool (3) is disengaged.

そして、ナイロンコード(2)を繰り出す場合には、一旦
前述の如くしてハウジング(1)とスプール(3)の係合を解
除し、該スプール(3)をハウジング(1)に対してナイロン
コード(2)を繰り出す方向に１回転又は前記複数の係合
突起(11)と係合受部(9)との位置関係で定まる所定角度
（図面実施例の場合、90゜,180゜又は270゜等）だけ回転さ
せた後、前述の如くしてハウジング(1)に組付ければよ
いものである。When the nylon cord (2) is fed out, the housing (1) and the spool (3) are disengaged as described above, and the spool (3) is attached to the housing (1) with the nylon cord (2). (2) One rotation in the feeding direction or a predetermined angle determined by the positional relationship between the plurality of engaging projections (11) and the engaging receiving portion (9) (90 °, 180 ° or 270 ° in the case of the illustrated embodiment) Etc.) and then assembled to the housing (1) as described above.

なお、図面実施例の場合、スプール(3)の筒状部(8)の内
側面における各係合受部(9)の上部間に円周方向に沿つ
て上側が小径で下側が大径の段部(10)を形成してあるの
で、ハウジング(1)からスプール(3)を外すことなく、ナ
イロンコード(2)を繰り出すこともできる。すなわち、
各係合突起(11)を内側に少し揺動させて係合突起(11)と
係合受部(9)との係合を解除し、スプール(3)を少し回転
させれば、第１図中右側に示す如く、係合突起(11)が前
記段部(10)に係合し、スプール(3)は回転方向にフリー
となるが下方には抜け落ちない。この状態において、ナ
イロンコード(2)を引き出せば、スプール(3)が自動的に
回転し、次に係合突起(11)と係合受部(9)の位置が一致
したときに、第１図中左側で示す如く、係合突起(11)が
支持部材(12)の両側片(12b)の弾性により係合受部(9)に
自動的に係合し、ナイロンコード(2)の繰出し作業が完
了し、その作業が一段と簡単となる。なお、ナイロンコ
ード(2)は草刈中に繰出し方向に張力を受けて残留歪が
生じている場合が多いので、通常は作業者自ら前述の如
くスプール(3)を少し回転させなくても、係合突起(11)
と係合受部(9)との係合を解除するとスプール(3)が自動
的に少し回転して係合突起(11)が段部(10)に係合するこ
とになるものである。In the case of the embodiment shown in the drawings, the upper side has a small diameter and the lower side has a large diameter along the circumferential direction between the upper portions of the engagement receiving portions (9) on the inner surface of the tubular portion (8) of the spool (3). Since the step portion (10) is formed, the nylon cord (2) can be paid out without removing the spool (3) from the housing (1). That is,
If each engagement protrusion (11) is slightly swung inward to disengage the engagement protrusion (11) from the engagement receiving portion (9) and the spool (3) is slightly rotated, As shown on the right side of the drawing, the engaging protrusion (11) engages with the stepped portion (10), and the spool (3) becomes free in the rotational direction but does not fall downward. In this state, if the nylon cord (2) is pulled out, the spool (3) automatically rotates, and when the position of the engaging protrusion (11) and the engaging receiving portion (9) match, the first As shown on the left side of the figure, the engagement protrusion (11) automatically engages with the engagement receiving portion (9) by the elasticity of both side pieces (12b) of the support member (12), and the nylon cord (2) is extended. The work is completed, and the work becomes easier. Since the nylon cord (2) is often subjected to tension in the feeding direction during mowing and residual strain is generated, normally the operator does not have to rotate the spool (3) a little as described above. Compound protrusion (11)
When the engagement between the engagement receiving portion (9) and the engagement receiving portion (9) is released, the spool (3) automatically rotates slightly and the engagement protrusion (11) engages with the step portion (10).

本考案では、このようにしてナイロンコード(2)の繰出
し作業が手動で行われるので、前記従来の発明の如くナ
イロンコード(2)の繰出しが自動的又は半自動的に行わ
れる場合に比べて多少の手数を要するものの、ナイロン
コード(2)の繰出し作業は簡単である。In the present invention, since the work for feeding out the nylon cord (2) is manually performed in this manner, compared to the case where the feeding out of the nylon cord (2) is automatically or semi-automatically performed as in the conventional invention described above, it is somewhat The work of feeding out the nylon cord (2) is easy, though it takes time.

また、本考案では、前述の如くスプール(3)の着脱が極
めて容易であるので、ナイロンコード(2)がなくなつた
際の新たなナイロンコードの補充も極めて容易である。Further, according to the present invention, since the spool (3) can be attached and detached very easily as described above, it is very easy to replenish a new nylon cord when the nylon cord (2) is lost.

さらに、本考案の構成要素は、基本的には、ハウジング
(1)とスプール(3)及び係合突起(11)を有する支持部材(1
2)だけであるため、構成が簡単で安価となる。Furthermore, the components of the present invention are basically the housing.
(1) Support member (1) having spool (3) and engaging protrusion (11)
Since it is only 2), the configuration is simple and inexpensive.

次に、第３図及び第４図に示す本考案の他の実施例につ
いて説明する。Next, another embodiment of the present invention shown in FIGS. 3 and 4 will be described.

第３図は縦断面図、第４図は第３図におけるIV−IV矢視
図であり、前記第１図及び第２図と同一構成部分は同一
符号を付し、その説明は省略する。なお、第３図中右側
と左側とでは係合突起(11)の異なる揺動状態を示してあ
る。3 is a longitudinal sectional view, and FIG. 4 is a view taken along the line IV-IV in FIG. 3. The same components as those in FIGS. 1 and 2 are designated by the same reference numerals, and the description thereof will be omitted. It should be noted that the right and left sides in FIG. 3 show different swinging states of the engaging projections (11).

この実施例が前記第１図及び第２図示の実施例と異なる
所は、支持部材(12)のハウジング(1)に対する支持方法
である。すなわち、前記第１図及び第２図示の実施例で
は、支持部材(12)の中央片(12a)をナツト(6)により共締
めすることによつて係合突起(11)がハウジング(1)に対
して支持されているが、この実施例では、支持部材(12)
の中央片(12a)は何ら固定されておらず、代わりにハウ
ジング(1)の内筒(7)の下方に係合突起(11)の適合孔(16)
が設けられ、該適合孔(16)への係合突起(11)の挿入と支
持部材(12)の両側片(12b)の弾性とによつて、係合突起
(11)がハウジング(1)側に支持されている。This embodiment differs from the embodiments shown in FIGS. 1 and 2 in the method of supporting the support member (12) with respect to the housing (1). That is, in the embodiment shown in FIGS. 1 and 2, the engaging projection (11) is formed on the housing (1) by fastening the central piece (12a) of the support member (12) together with the nut (6). However, in this embodiment, the support member (12)
The central piece (12a) of the housing is not fixed at all, and instead the fitting hole (16) of the engaging projection (11) is provided below the inner cylinder (7) of the housing (1).
Is provided, and by the insertion of the engaging projection (11) into the matching hole (16) and the elasticity of both side pieces (12b) of the supporting member (12), the engaging projection is provided.
(11) is supported on the housing (1) side.

この実施例の場合にも、前記第１図及び第２図示と全く
同様の作用、効果が得られるものである。第５図乃至第
８図には、さらに他の実施例が示されている。Also in the case of this embodiment, the same operation and effect as those shown in FIGS. 1 and 2 can be obtained. Still another embodiment is shown in FIGS.

第５図は縦断面図、第６図はスプールの支持部材の平面
図、第７図は第６図VII−VII矢視図、第８図は底面図で
あり、前記第１図乃至第４図実施例と同一構成部分には
同一符号を付し、その説明は省略する。FIG. 5 is a longitudinal sectional view, FIG. 6 is a plan view of a support member for a spool, FIG. 7 is a view taken along arrow VII-VII of FIG. 6, and FIG. 8 is a bottom view. The same components as those in the illustrated embodiment are designated by the same reference numerals, and the description thereof will be omitted.

なお、第５図中、右側と左側とでは係合突起(11)の異な
る揺動状態を示してある。この実施例が第１図、第２図
実施例及び第３図、第４図実施例と異るところは、ハウ
ジング(1)とスプール(3)の支持部材(12)である。In FIG. 5, the right and left sides show different swinging states of the engaging projections (11). This embodiment differs from the embodiment shown in FIGS. 1 and 2 and FIGS. 3 and 4 in the support member (12) for the housing (1) and the spool (3).

すなわち、前記各実施例におけるハウジング(1)の内筒
(7)に該当する部分をスプール(3)の支持部材(12)に設け
たものである。That is, the inner cylinder of the housing (1) in each of the above embodiments
The part corresponding to (7) is provided on the support member (12) of the spool (3).

その詳細が第６図、第７図、第８図に示されている。The details are shown in FIGS. 6, 7, and 8.

すなわち、前記各実施例における支持部材(12)を構成す
る両側片(12b)を除く部分に、前記各実施例におけるハ
ウジング(1)の内筒(7)にかわる肉厚円筒部(17)を一体成
形するとともに、中央片(12a)も肉厚にし、その上面部
に、ハウジング(1)側に予め設けた凹部(18)と適合する
凸部(19)を設けたものである。そして、支持部材(12)の
中央片(12a)を第１図、第２図実施例と同様に出力軸(5)
に対してハウジング(1)と共にナツト(6)止めしたもので
ある。That is, a thick cylindrical portion (17) that replaces the inner cylinder (7) of the housing (1) in each of the above-described embodiments is provided in a portion excluding both side pieces (12b) that form the support member (12) in each of the above-described embodiments. In addition to being integrally molded, the central piece (12a) is also made thick, and a convex portion (19) matching the concave portion (18) previously provided on the housing (1) side is provided on the upper surface portion thereof. Then, the central piece (12a) of the support member (12) is attached to the output shaft (5) in the same manner as in the embodiment of FIGS. 1 and 2.
On the other hand, the nut (6) is fixed together with the housing (1).

この実施例では支持部材(12)がスプール(3)の回転方向
と軸方向の力を受けることになるものである。In this embodiment, the support member (12) receives forces in the rotation direction and the axial direction of the spool (3).

また、この実施例においては、ハウジングがアルミニウ
ムなどの金属製とされる場合に、前記内筒(7)部を樹脂
製の支持部材(12)側に一体成形することができるため、
重量及びコスト低減を図ることができるものである。Further, in this embodiment, when the housing is made of metal such as aluminum, the inner cylinder (7) can be integrally formed on the resin support member (12) side,
The weight and cost can be reduced.

なお、前記第３図及び第４図示の実施例において、支持
部材(12)の中央片(12a)とスプール(3)の下部との間を一
部連結する連結片（図示せず）を設け、支持部材(12)、
スプール(3)及び前記連結片を一体成形してもよく、こ
の場合には部品点数を減らすことができる等の利点があ
る。In addition, in the embodiment shown in FIGS. 3 and 4, a connecting piece (not shown) is provided to partially connect the central piece 12a of the supporting member 12 and the lower portion of the spool 3. , Support member (12),
The spool (3) and the connecting piece may be integrally formed, and in this case, there is an advantage that the number of parts can be reduced.

〔考案の効果〕[Effect of device]

本考案によれば、構造が極めて簡単で安価であるととも
に、可撓性フイラメントの繰出し及び補充を容易に行う
ことができる効果が得られるものである。According to the present invention, it is possible to obtain an effect that the structure is extremely simple and inexpensive, and that the flexible filament can be easily fed and replenished.

また、スプールの筒状部の内側面における各係合受部の
上部間に円周方向に沿つて上側が小径で下側が大径の段
部を形成しておけば、可撓性フイラメントの繰出しを一
段と容易に行うことができる効果が得られるものであ
る。Further, if a stepped portion having a small diameter on the upper side and a large diameter on the lower side is formed along the circumferential direction between the upper portions of the engagement receiving portions on the inner surface of the cylindrical portion of the spool, the flexible filament is delivered. It is possible to obtain the effect that the above can be performed more easily.

【図面の簡単な説明】[Brief description of drawings]

図面は本考案の一実施例を示すもので、第１図は縦断面
図、第２図は第１図におけるII−II矢視図、第３図は他
の実施例を示す縦断面図、第４図は第３図におけるIV−
IV矢視図、第５図はさらに他の実施例を示す縦断面図、
第６図はスプールの支持部材の平面図、第７図は第６図
VII−VII矢視図、第８図は底面図である。 (1)…ハウジング、(2)…可撓性フイラメント（ナイロン
コード）、(3)…スプール、(8)…筒状部、(9)…係合受
部、(10)…段部、(11)…係合突起。The drawings show one embodiment of the present invention. FIG. 1 is a vertical sectional view, FIG. 2 is a sectional view taken along the line II-II in FIG. 1, and FIG. 3 is a vertical sectional view showing another embodiment. Fig. 4 shows IV- in Fig. 3.
IV view, FIG. 5 is a longitudinal sectional view showing still another embodiment,
FIG. 6 is a plan view of the support member of the spool, and FIG. 7 is FIG.
VII-VII arrow view, FIG. 8 is a bottom view. (1) ... Housing, (2) ... Flexible filament (nylon cord), (3) ... Spool, (8) ... Cylindrical part, (9) ... Engagement receiving part, (10) ... Step part, ( 11) ... Engagement protrusion.

Claims (2)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項１】出力軸側に固定されたハウジングと、該ハ
ウジングに下方から嵌合され、可撓性フイラメントが巻
回されたスプールとを備え、前記スプールの筒状部の内
側面にその円周方向に渡つて複数の係合受部を形成し、
前記ハウジングに嵌合した際のスプールの筒状部の径方
向に揺動自在で該筒状部の内側面に向かう向きに付勢さ
れた複数の係合突起を前記ハウジング側に支持し、該係
合突起の揺動状態に応じて該係合突起と前記係合受部と
を係脱自在ならしめてなることを特徴とする可撓性フイ
ラメント式草刈機のヘツド構造。1. A housing fixed to an output shaft side, and a spool which is fitted into the housing from below and around which a flexible filament is wound, the inner surface of a cylindrical portion of the spool having a circular shape. A plurality of engagement receiving portions are formed in the circumferential direction,
A plurality of engaging projections that are swingable in the radial direction of the tubular portion of the spool when fitted in the housing and are biased toward the inner surface of the tubular portion are supported on the housing side; A head structure for a flexible filament type mower, wherein the engagement projection and the engagement receiving portion are engaged and disengaged in accordance with the swinging state of the engagement projection. 【請求項２】スプールの筒状部の内側面における各係合
受部の上部間に円周方向に沿つて上側が小径で下側が大
径の段部を形成してなることを特徴とする請求項１記載
の可撓性フイラメント式草刈機のヘツド構造。2. A stepped portion having a small diameter on the upper side and a large diameter on the lower side is formed along the circumferential direction between the upper portions of the engagement receiving portions on the inner surface of the tubular portion of the spool along the circumferential direction. A head structure for a flexible filament mower according to claim 1.