JPH0451126B2 - - Google Patents
Info
- Publication number
- JPH0451126B2 JPH0451126B2 JP62031525A JP3152587A JPH0451126B2 JP H0451126 B2 JPH0451126 B2 JP H0451126B2 JP 62031525 A JP62031525 A JP 62031525A JP 3152587 A JP3152587 A JP 3152587A JP H0451126 B2 JPH0451126 B2 JP H0451126B2
- Authority
- JP
- Japan
- Prior art keywords
- spool
- cord
- exterior body
- engagement
- output shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000007246 mechanism Effects 0.000 claims description 16
- 210000000078 claw Anatomy 0.000 description 8
- 238000004804 winding Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 230000002079 cooperative effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012840 feeding operation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
Landscapes
- Harvester Elements (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、長尺の柄管の基端部に原動機を取付
けると共に、先端部にギヤーハウジングを介して
外装体を取付け、該外装体より半径方向に導出し
たコードを外装体の回転遠心力を利用して草等の
刈払作業を行う刈払機のコード繰出し装置に関す
るものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to attaching a prime mover to the proximal end of a long stem tube, and attaching an exterior body to the distal end via a gear housing. The present invention relates to a cord feeding device for a brush cutter that cuts grass and the like by using a rotational centrifugal force of an exterior body with a cord drawn out in a radial direction.
従来、この種の刈払機においては、刈払作業に
よつて先端部が損耗して短くなつたコードの繰出
し手段として、回転体の回転を止め、コード導出
部の係止を解いてコードの先端部を把持して適宜
の長さに引出すものがあるが（例えば、特公昭54
−17651号公報参照）、この場合は回転体の回転を
止め、手作業でコードを引出すので、その繰出し
作業が面倒で非能率的であるという問題があつ
た。
Conventionally, in this type of brush cutter, as a means for feeding out the cord whose tip end has become short due to wear and tear during brush cutting work, the rotation of the rotating body is stopped, the locking of the cord lead-out part is released, and the tip of the cord is fed out. There are some that grip the section and pull it out to an appropriate length (for example, the
In this case, the rotation of the rotating body is stopped and the cord is pulled out manually, which poses a problem that the drawing out process is troublesome and inefficient.
そこで、本出願人はさきに第４図に示すコード
繰出し装置を提案した（特願昭60−110248号、昭
和60年５月24日出願）。 Therefore, the present applicant previously proposed a cord feeding device shown in FIG. 4 (Japanese Patent Application No. 110248/1983, filed May 24, 1985).
即ち、出力軸１に固定されて回転する回転体２
内に、上記出力軸１に回転自在かつ軸方向に摺動
自在にしてスプリング３により下方に付勢される
コード４を巻回したリール５を設け、該リール５
の上部フランジ６と回転体２の上部内壁とに夫々
対向してリール５をコード巻回の緩み方向に回転
させる鋸歯状の歩進爪７，８を設けると共に、リ
ール５の下部フランジ９と回転体２の下部内壁と
に夫々対向して係合用のテーパー面を有する凹凸
部１０，１１を設け、前記リール５の下部に回転
体２の下面より突出する押圧部１２を設けたもの
であり、コード４の繰出しに当つては、押圧部１
２を地面等に押付ければ、リール５はスプリング
３に抗して上昇し、凹凸部１０，１１の係合を解
くと共に歩進爪７，８の協同作用によつて、リー
ル５がコード巻回の緩み方向に自動的に一ステツ
プで回動し、コード４の上記緩んだ分がリール５
の回転遠心力により自動的に繰出されるものであ
る。 That is, a rotating body 2 that is fixed to the output shaft 1 and rotates.
A reel 5 is provided within the output shaft 1, around which a cord 4 is wound so as to be rotatable and slidable in the axial direction and urged downward by a spring 3.
Serrated stepping claws 7 and 8 are provided on the upper flange 6 of the reel 5 and the upper inner wall of the rotating body 2 to rotate the reel 5 in the direction of loosening the winding of the cord. Concave and convex portions 10 and 11 having tapered surfaces for engagement are provided on the lower inner wall of the body 2, respectively, and a pressing portion 12 that protrudes from the lower surface of the rotating body 2 is provided on the lower part of the reel 5, When feeding out cord 4, press part 1
When the reel 2 is pressed against the ground, etc., the reel 5 rises against the spring 3, disengaging the uneven parts 10 and 11, and by the cooperative action of the stepping claws 7 and 8, the reel 5 starts winding the cord. It automatically rotates in one step in the direction of the loosening of the cord 4, and the loosened portion of the cord 4 is reeled to the reel 5.
It is automatically fed out by the centrifugal force of rotation.
よつて、コードの繰出しは前記従来例に比し、
容易にして確実であるが、次のような問題点のあ
ることが見出された。 Therefore, the cord is fed out compared to the conventional example,
Although it is easy and reliable, it has been found that there are the following problems.
(a) リール５の上部及び下部の各フランジ６，９
に歩進爪７、係合用の凸部１０を設けると共
に、押圧部１２を設けているので、リール５の
成形加工が面倒であること。(a) Upper and lower flanges 6 and 9 of reel 5
Since the advancing pawl 7 and the engaging convex part 10 are provided on the reel 5, and the pressing part 12 is also provided, the molding process of the reel 5 is troublesome.
(b) 押圧部１２が回転体２の下面より突出してい
るので、外観が悪いこと。(b) Since the pressing portion 12 protrudes from the lower surface of the rotating body 2, the appearance is poor.
本発明は、回転出力軸に固着されたコード巻回
のスプールと、該スプールを内装し、スプールに
対してスプリング付勢され、前記回転出力軸に回
転自在かつ軸方向に摺動自在な外装体とから成
り、前記スプールと外装体との間には、スプール
の回転を外装体に伝達又は解除する係合機構と、
外装体の押圧時にスプールに係合し、外装体をス
プールに巻回したコードの緩み方向に回転させる
歩進機構とを設けたことにある。
The present invention includes a cord-wound spool fixed to a rotary output shaft, and an exterior body that houses the spool, is biased by a spring against the spool, and is rotatable and slidable in the axial direction on the rotary output shaft. an engagement mechanism between the spool and the exterior body that transmits or releases the rotation of the spool to the exterior body;
A stepping mechanism is provided which engages the spool when the exterior body is pressed and rotates the exterior body in a direction in which the cord wound around the spool is loosened.
よつて、コードの損耗時には外装体を地面等に
押付けることにより、スプールと外装体との係合
機構が解かれ、歩進機構の係合により外装体が一
ステツプあてコードの緩み方向に回転し、この緩
んだ分のコードがスプールの回転遠心力により自
動的に繰出されるものである。 Therefore, when the cord wears out, the engagement mechanism between the spool and the exterior body is released by pressing the exterior body against the ground, etc., and the exterior body rotates in the direction of loosening the cord by one step due to the engagement of the stepping mechanism. However, this loosened cord is automatically paid out by the rotational centrifugal force of the spool.
本発明の実施例を図面を参照して説明する。 Embodiments of the present invention will be described with reference to the drawings.
第１図は刈払機全体の斜視図を示し、１３はグ
リツプ１３ａを有する長尺の柄管、１４は柄管１
３の基端部に取付けた原動機、１５は柄管１３の
先端部に取付けたギヤーハウジング、１６は外装
体、１７は外装体１６内に収納されているスプー
ルより導出するコードである。 FIG. 1 shows a perspective view of the entire brush cutter, with reference numeral 13 a long handle tube having a grip 13a, and 14 a handle tube 1.
3 is a prime mover attached to the base end, 15 is a gear housing attached to the tip of the handle tube 13, 16 is an exterior body, and 17 is a cord led out from a spool housed in the exterior body 16.
而して、前記外装体１６は、第２図の縦断面図
に示すように、中央開口１６a1を有する上壁１６
ａ、側壁１６ｂ及び下壁１６ｃより成る偏平な円
筒状に形成され、側壁１６ｂの対向する位置にコ
ード１７の導出孔１６b1が穿設されている。 As shown in the longitudinal sectional view of FIG. 2, the exterior body 16 has an upper wall 16 having a central opening 16a1 .
A, it is formed into a flat cylindrical shape consisting of a side wall 16b and a lower wall 16c, and a lead-out hole 16b1 for the cord 17 is bored at an opposing position of the side wall 16b.
１８は外装体１６の中央開口１６a1を介して収
納されたスプールで、該スプール１８の中央円筒
部１８ａは前記ギヤーハウジング１５内の出力軸
１９のボス部１９ａに嵌着固定され、スプール１
８は出力軸１９と共に回転する。 Reference numeral 18 denotes a spool housed through the central opening 16a 1 of the exterior body 16. The central cylindrical portion 18a of the spool 18 is fitted and fixed to the boss portion 19a of the output shaft 19 in the gear housing 15, and the spool 1
8 rotates together with the output shaft 19.
そして、スプール１８の二又部１８ｃに、スプ
ール１８の回転遠心力により緩まない方向にコー
ド１７が巻回されている。 The cord 17 is wound around the forked portion 18c of the spool 18 in a direction that does not loosen due to the rotational centrifugal force of the spool 18.
２０は出力軸１９のボス部１９ａと、外装体１
６の下壁１６ｃに形成したガイド用の環状壁１６
c1の外周との間に張設され、外装体１６を下方に
付勢するコイルスプリングであり、外装体１６は
出力軸１９のボス部１９ａより突設したガイド棒
１９ｂに環状壁１６c1が摺動することにより、上
下動かつ回転可能になされている。 20 is the boss portion 19a of the output shaft 19 and the exterior body 1
An annular wall 16 for guide formed on the lower wall 16c of 6
The outer casing 16 is a coil spring that is stretched between the outer periphery of the output shaft 19 and the outer periphery of the outer casing 16 and urges the outer casing 16 downward . By sliding, it can move up and down and rotate.
而して、外装体１６の上壁１６ａの内面とスプ
ール１８の腕部１８ｂの上面とには係合離脱する
係合機構２１，２２が環状に形成され、係合時に
スプール１８の回転を外装体１６に伝達する。 Engagement mechanisms 21 and 22 that engage and disengage are formed in an annular shape on the inner surface of the upper wall 16a of the exterior body 16 and the upper surface of the arm portion 18b of the spool 18, and prevent rotation of the spool 18 when engaged. to the body 16.
また、外装体１６の下壁１６ｃの内面とスプー
ル１８の腕部１８ｂの下面とには歩進機構２３，
２４が環状に形成され、係合時には外装体１６を
スプール１８に対して回転させる。 Furthermore, a stepping mechanism 23 is provided on the inner surface of the lower wall 16c of the exterior body 16 and the lower surface of the arm portion 18b of the spool 18.
24 is formed in an annular shape, and rotates the exterior body 16 relative to the spool 18 when engaged.
次に、前記係合機構及び歩進機構の一部展開図
を第３図に示す。 Next, FIG. 3 shows a partially exploded view of the engagement mechanism and stepping mechanism.
係合機構２１，２２は、一辺にテーパー面を有
する係合凹部２５と係合凸部２６が等ピツチに複
数個形成され、歩進機構２３，２４は、鋸歯状の
歩進爪２７，２８が等ピツチに複数個形成されて
いる。 The engagement mechanisms 21 and 22 have a plurality of engagement recesses 25 and engagement protrusions 26 formed at equal pitches on one side, and the advancement mechanisms 23 and 24 have sawtooth advancement pawls 27 and 28. are formed at equal intervals.
第３図Ａは、コイルスプリング２０の付勢によ
り外装体１６が降下し、外装体１６の係合凹部２
５がスプール１８の係合凸部２６に係合し、外装
体１６の歩進爪２７がスプール１８の歩進爪２８
より離脱した状態を示し、係合凹部２５と係合凸
部２６との係合により、スプール１８の矢印Ｆ方
向の回転と共に外装体１６も同方向に回転し、導
出孔１６b1より延出したコード１７により刈払作
業が行われる。 FIG. 3A shows that the outer body 16 is lowered by the bias of the coil spring 20, and the engagement recess 2 of the outer body 16 is lowered.
5 engages with the engagement protrusion 26 of the spool 18, and the advancing pawl 27 of the exterior body 16 engages the advancing pawl 28 of the spool 18.
Due to the engagement between the engagement recess 25 and the engagement protrusion 26, the spool 18 rotates in the direction of arrow F, and the exterior body 16 also rotates in the same direction, extending from the outlet hole 16b1. Brush cutting work is performed by code 17.
而して、同図に示すように、鋸歯状の歩進爪２
７，２８は、そのテーパー面の先端部を間隔ｄだ
けラツプするように形成されている。 As shown in the figure, the serrated advancing pawl 2
7 and 28 are formed so as to wrap the tips of their tapered surfaces by a distance d.
第３図Ｂ〜Ｄはコード１７の繰出し操作の態様
を示すものである。 3B to 3D show the manner in which the cord 17 is fed out.
即ち、外装体１６の下壁１６ｃを地面等に押付
けると、第３図Ｂのように、外装体１６はコイル
スプリング２０に抗して矢印Ｐ方向に上昇し、ス
プール１８の歩進爪２８に外装体１６の歩進爪２
７が前記ラツプ間隔ｄだけ当接すると共に、外装
体１６の係合凹部２５がスプール１８の係合凸部
２６より離脱する。 That is, when the lower wall 16c of the exterior body 16 is pressed against the ground or the like, the exterior body 16 rises in the direction of arrow P against the coil spring 20, as shown in FIG. The advancing claw 2 of the exterior body 16
7 come into contact with each other by the above-mentioned lap interval d, and the engagement recess 25 of the exterior body 16 separates from the engagement protrusion 26 of the spool 18.
外装体１６の地面等への押付けを強めると、第
３図Ｃのように、歩進爪２７が歩進爪２８に沿い
移動するに伴い外装体１６は矢印Ｒ方向に回転す
る。即ち、スプール１８に対してコード１７の巻
回が緩む方向に一ステツプだけ回転し、この巻回
の緩んだ分がスプール１８の回転遠心力により外
装体１６の導出孔１６b1から自動的に繰出され
る。 When the pressing of the exterior body 16 against the ground or the like is strengthened, the exterior body 16 rotates in the direction of arrow R as the stepping claw 27 moves along the stepping claw 28, as shown in FIG. 3C. That is, the winding of the cord 17 rotates by one step in the direction of loosening the winding of the cord 17 with respect to the spool 18, and the loosened winding is automatically drawn out from the outlet hole 16b1 of the exterior body 16 by the centrifugal force of the rotation of the spool 18. be done.
そして、外装体１６の地面等への押付けを解く
と、第３図Ｄのように、外装体１６はコイルスプ
リング２０の付勢により矢印P1方向に降下し、
歩進爪２７，２８の係合が解かれると共に、係合
凹部２５が係合凸部２６に当接するが、この際係
合凹部２５のテーパー面が係合凸部２６のテーパ
ー面を摺動することにより、外装体１６は同図右
方へ移動し、第３図Ａの状態（歩進爪２７，２８
に間隔ｄを作る）に復帰する。 Then, when the exterior body 16 is released from being pressed against the ground, etc., the exterior body 16 descends in the direction of arrow P1 due to the bias of the coil spring 20, as shown in FIG. 3D.
As the advancing pawls 27 and 28 are disengaged, the engagement recess 25 comes into contact with the engagement protrusion 26, but at this time, the tapered surface of the engagement recess 25 slides on the tapered surface of the engagement protrusion 26. By doing so, the exterior body 16 moves to the right in the same figure, and the state shown in FIG. 3A (stepping claws 27, 28
create an interval d).
以上のように、外装体１６を地面等へ押付ける
毎に歩進爪２７，２８の一ステツプあての長さに
相当するコード１７が繰出される。 As described above, each time the exterior body 16 is pressed against the ground or the like, the cord 17 corresponding to the length of one step of the stepping claws 27, 28 is fed out.
なお、係合凹部２５、係合凸部２６及び歩進爪
２７，２８の個数は、一ステツプあてのコード繰
出し長さを考慮して適宜になし得る。 The numbers of the engaging recesses 25, the engaging protrusions 26, and the stepping claws 27, 28 can be determined as appropriate in consideration of the length of the cord fed out for one step.
また、コードの繰出しはスプールの回転を止め
ても可能であることは明らかである。 It is also clear that the cord can be fed out even if the rotation of the spool is stopped.
さらに、前記実施例では、係合凹凸部２５，２
６及び歩進爪２７，２８を一対一の関係に形成し
たが、出力軸１９の可逆回転に考慮して、係合凹
部２５、係合凸部２６及び歩進爪２７，２８に
夫々並列してテーパー面を逆向きにした係合凹
部、係合凸部及び歩進爪を形成し、出力軸１９の
可逆回転に対して外装体及びスプールを共用する
ことを可能としてコストの低減を図ることもでき
る。 Furthermore, in the embodiment, the engaging uneven portions 25, 2
6 and the advancing pawls 27, 28 are formed in a one-to-one relationship, but in consideration of the reversible rotation of the output shaft 19, the engaging recess 25, the engaging protrusion 26, and the advancing pawls 27, 28 are arranged in parallel with each other. To reduce costs by forming an engaging recess, an engaging protrusion, and a stepping pawl with tapered surfaces facing in opposite directions, and making it possible to share the exterior body and spool for reversible rotation of the output shaft 19. You can also do it.
本発明は次の効果を有する。 The present invention has the following effects.
(a) 外装体より導出する刈払い用のコードが損耗
したときに、外装体を地面等に押付けるという
簡単な操作により、所定長のコードを自動的に
繰出すことができる。(a) When the mowing cord led out from the exterior body becomes worn out, a predetermined length of cord can be automatically fed out by a simple operation of pressing the exterior body against the ground, etc.
(b) コードの繰出しは、スプールの回転を継続或
いは止めても可能であり、しかも歩進機構によ
つて一ステツプあてのコード繰出しが確実に行
われ、不要なコード繰出し長となることがな
い。(b) The cord can be fed out by continuing or stopping the rotation of the spool, and the stepping mechanism ensures that the cord is fed out in one step, so that unnecessary cord feeding length is not caused. .
(c) 従来のような回転体より突出する地面等への
押圧部がないので、外装体の外観がよい。(c) The external appearance of the exterior body is good because there is no pressing part that protrudes from the rotating body and presses against the ground as in the conventional case.
第１図〜第３図は本発明の実施例を示し、第１
図は刈払機全体の斜視図、第２図は外装体の縦断
面図、第３図Ａ〜Ｄはコードの自動繰出し作動の
説明図、第４図は従来例の縦断面図である。
１６……外装体、１７……コード、１８……ス
プール、１９……出力軸、２０……コイルスプリ
ング、２１，２２……係合機構、２３，２４……
歩進機構、２５……係合凹部、２６……係合凸
部、２７，２８……歩進爪。
1 to 3 show embodiments of the present invention;
2 is a longitudinal sectional view of the exterior body, FIGS. 3A to 3D are explanatory diagrams of the automatic cord feeding operation, and FIG. 4 is a longitudinal sectional view of a conventional example. 16... Exterior body, 17... Cord, 18... Spool, 19... Output shaft, 20... Coil spring, 21, 22... Engagement mechanism, 23, 24...
Stepping mechanism, 25... Engaging recess, 26... Engaging protrusion, 27, 28... Stepping pawl.
Claims (1)
ルと、該スプールを内装し、スプールに対してス
プリング付勢され、前記回転出力軸に回転自在か
つ軸方向に摺動自在な外装体とから成り、 前記スプールと外装体との間には、スプールの
回転を外装体に伝達又は解除する係合機構と、外
装体の押圧時にスプールに係合し、外装体をスプ
ールに巻回したコードの緩み方向に回転させる歩
進機構とを設けたことを特徴とする刈払機のコー
ド繰出し装置。[Scope of Claims] 1. A cord-wound spool fixed to a rotational output shaft, and a cord-wound spool with the spool installed inside, which is biased by a spring against the spool and is rotatable and slidable in the axial direction on the rotational output shaft. An engagement mechanism is provided between the spool and the exterior body to transmit or release the rotation of the spool to the exterior body, and an engagement mechanism that engages with the spool when the exterior body is pressed and causes the exterior body to connect to the spool. A cord feeding device for a brush cutter, comprising a stepping mechanism for rotating a wound cord in a loosening direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62031525A JPS63198915A (en) | 1987-02-16 | 1987-02-16 | Brush cutter cord feeding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62031525A JPS63198915A (en) | 1987-02-16 | 1987-02-16 | Brush cutter cord feeding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63198915A JPS63198915A (en) | 1988-08-17 |
| JPH0451126B2 true JPH0451126B2 (en) | 1992-08-18 |
Family
ID=12333605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62031525A Granted JPS63198915A (en) | 1987-02-16 | 1987-02-16 | Brush cutter cord feeding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63198915A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6952877B2 (en) | 2003-01-10 | 2005-10-11 | Shindaiwa, Inc. | Vegetation cutting device |
| JP6047115B2 (en) * | 2014-03-26 | 2016-12-21 | 株式会社ナゴシ | Corded mower |
-
1987
- 1987-02-16 JP JP62031525A patent/JPS63198915A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63198915A (en) | 1988-08-17 |
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