JP2014090683A - Bush cutting head of cord type bush cutter - Google Patents

Bush cutting head of cord type bush cutter Download PDF

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JP2014090683A
JP2014090683A JP2012241989A JP2012241989A JP2014090683A JP 2014090683 A JP2014090683 A JP 2014090683A JP 2012241989 A JP2012241989 A JP 2012241989A JP 2012241989 A JP2012241989 A JP 2012241989A JP 2014090683 A JP2014090683 A JP 2014090683A
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cord
stopper
brush cutter
bearing
head
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JP6047374B2 (en
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Yuki Sugihara
勇気 杉原
Katsuhiro Takeshita
勝浩 竹下
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Diatop Corp
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Diatop Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a bush cutting head of a cord type bush cutter, capable of more improving the durability and the operability, decreasing the number of parts, and reusing the parts.SOLUTION: A bush cutting head of a cord type bush cutter is adapted to cut bush by rotating a flexible cord at high speed. The bush cutting head includes: a striking member 10 abutted on the ground; and an operating member 20 for controlling a length of the cord. A bearing 30 is interposed between the striking member 10 and the operating member 20. The striking member 10 and the operating member 20 are provided with a plurality of locking claws 13a, 23a for locking the bearing 30.

Description

本発明は、可撓性のコードを高速回転させて草を刈るコード式刈払機の刈払ヘッドに関する。   The present invention relates to a brush cutter head of a cord type brush cutter that cuts grass by rotating a flexible cord at high speed.

着脱可能に組み付けられたハウジングとカバーとを有し、可撓性のコードを高速回転させて草を刈るコード式刈払機の刈払ヘッドとして、特許文献１に示す構成のものが知られている。この刈払ヘッドは、操作部材（２４）がカバー（蓋板１６）より突出して設けられ、地面に当接する打当部材が操作部材（２４）の先端に一体として設けられている。そして、この打当部材に金属製の保護部材（２７）がインサート成形されている。このため、草刈作業に伴う打当部材の摩耗を抑制することができると考えられる。   As a brush-type brush cutter for a cord type brush cutter having a housing and a cover that are detachably assembled and rotating a flexible cord at a high speed to cut grass, a configuration shown in Patent Document 1 is known. . In this brush cutting head, an operation member (24) is provided so as to protrude from the cover (lid plate 16), and a striking member that comes into contact with the ground is provided integrally at the tip of the operation member (24). And the metal protection member (27) is insert-molded by this hitting member. For this reason, it is thought that the wear of the striking member accompanying the mowing work can be suppressed.

特開２００２−２９１３１５号公報（図１）JP 2002-291315 A (FIG. 1)

しかし、上記従来の刈払ヘッドでは、打当部材が操作部材の先端に一体として設けられているため、草刈り作業中に打当部材を地面に打ち当てたり、打当部材が地面に接触したりした場合であっても、打当部材は操作部材とともに回転してしまう。そのため、草刈作業に伴う打当部材の摩耗を完全には抑制することができない。また、打当部材に地面からの反動を受けるため、円滑な操作がし難い場合も生じ得る。したがって、草刈り作業中に打当部材を地面に打ち当てたり、打当部材が地面に接触したりした場合には、打当部材が操作部材とともに回転しないようにできれば、耐久性及び操作性をより向上させることができる。この目的を達成するため、図５に示すように、打当部材７０と操作部材７１との間にベアリング７２を設け、ボルト７３、７４及び座金７５、７６でベアリング７２を装着させた刈払ヘッドが考えられる。しかし、この刈払ヘッドでは、ボルト７３、７４及び座金７５、７６が必要であり、部品点数が多くなって、組立作業が複雑になるとともに製造コストの高騰化を招いてしまう。さらには、ボルト７３、７４及び座金７５、７６等の金属部品が多くなると刈払ヘッドの重量が増加し、操作し難くなる。   However, since the hitting member is integrally provided at the tip of the operation member in the conventional brush head, the hitting member hits the ground during the mowing operation, or the hitting member contacts the ground. Even in this case, the striking member rotates together with the operation member. For this reason, the wear of the striking member accompanying the mowing operation cannot be completely suppressed. Moreover, since the striking member receives a reaction from the ground, it may be difficult to perform a smooth operation. Therefore, if the striking member hits the ground during the mowing operation or the striking member contacts the ground, the durability and operability can be improved if the striking member does not rotate with the operation member. Can be improved. In order to achieve this object, as shown in FIG. 5, a bush 72 is provided with a bearing 72 between a striking member 70 and an operating member 71, and the bearing 72 is mounted with bolts 73, 74 and washers 75, 76. Can be considered. However, this brush head requires bolts 73 and 74 and washers 75 and 76, which increases the number of parts, complicates the assembly work, and raises the manufacturing cost. Furthermore, when the number of metal parts such as bolts 73 and 74 and washers 75 and 76 increases, the weight of the brush head increases and it becomes difficult to operate.

また、図６に示すように、アルミダイカスト等の金属性の打当部材８０と操作部材８１との間にベアリング８２を設け、凸部８０ａ、８１ａをかしめることにより、ベアリング８２を装着させた刈払ヘッドが考えられる。しかし、この刈払ヘッドでは、金属部品を採用するため重量が増加するとともに、打当部材８０と操作部材８１とを分解することができず部品を再利用することができない。   Further, as shown in FIG. 6, a bearing 82 is provided between a metallic hitting member 80 such as aluminum die casting and the operation member 81, and the bearings 82 are mounted by caulking the convex portions 80a and 81a. A brush head is conceivable. However, in this brush cutting head, since the metal parts are employed, the weight increases, and the hitting member 80 and the operation member 81 cannot be disassembled, and the parts cannot be reused.

本発明はかかる従来の問題点に鑑みてなされたものであり、耐久性及び操作性をより向上させることができるとともに、部品点数を少なくし、かつ部品の再利用可能なコード式刈払機の刈払ヘッドを提供するものである。   The present invention has been made in view of such conventional problems, and can improve durability and operability, reduce the number of components, and recycle the cord type brush cutter that can reuse components. A payment head is provided.

上記の課題を解決するために、請求項１に係るコード式刈払機の刈払ヘッドの特徴は、可撓性のコードを高速回転させて草を刈るコード式刈払機の刈払ヘッドにおいて、該刈払ヘッドは、地面に当接する打当部材と、コードの長さを調節する操作部材とを有し、該打当部材と該操作部材との間にはベアリングが介装され、該打当部材及び該操作部材には、該ベアリングを係止する複数組の係止爪が設けられていることである。   In order to solve the above-described problem, the cord type brush cutter head according to claim 1 is characterized in that in the cord type brush cutter head for cutting grass by rotating a flexible cord at high speed, The brush cutting head has a striking member that abuts against the ground and an operation member that adjusts the length of the cord, and a bearing is interposed between the striking member and the manipulation member, and the striking member The member and the operation member are provided with a plurality of sets of locking claws for locking the bearing.

請求項２に係るコード式刈払機の刈払ヘッドの特徴は、前記打当部材及び前記操作部材には、前記係止爪による前記ベアリングの係止を補強するストッパーが設けられていることである。   A feature of the brush cutter of the cord type brush cutter according to claim 2 is that the hitting member and the operation member are provided with a stopper for reinforcing the locking of the bearing by the locking claw. .

請求項３に係るコード式刈払機の刈払ヘッドの特徴は、前記係止爪と前記ストッパーとには、係合する凹部と凸部とが設けられていることである。   A feature of the brush cutter of the cord type brush cutter according to claim 3 is that the engaging claw and the stopper are provided with a concave portion and a convex portion to be engaged.

請求項４に係るコード式刈払機の刈払ヘッドの特徴は、前記ストッパーには、タッピングスクリューをねじ込み可能な取外し穴が設けられていることである。   According to a fourth aspect of the present invention, there is provided a cord type brush cutter having a detachable hole into which the tapping screw can be screwed.

請求項５に係るコード式刈払機の刈払ヘッドの特徴は、前記打当部材と前記操作部材とには、軸心回りであって同心円状に、遊嵌される凹条と凸条とが設けられていることである。   According to a fifth aspect of the present invention, there is provided a cord-type brush cutter having a brush head having a concentric circle and a concentric ridge that are loosely fitted around the hitting member and the operation member. It is provided.

請求項１に係るコード式刈払機の刈払ヘッドにおいては、打当部材と操作部材との間にベアリングが介装されているため、打当部材と操作部材とは軸心回りに互いに自由に回動可能である。これにより、草刈り作業中に打当部材を地面に打ち当てたり、打当部材が地面に接触したりした場合には、打当部材だけを静止させることができる。そのため、打当部材の摩耗、及び地面から打当部材への反動をより抑制することができ、耐久性及び操作性をより向上させることができる。また、打当部材及び操作部材には複数組の係止爪が設けられ、この係止爪によりベアリングを係止することができる。そのため、ベアリングを係止するための特別な部品を必要とせず、部品点数を少なくすることができるうえ、打当部材と操作部材とを分解することもできる。したがって、このコード式刈払機の刈払ヘッドによれば、耐久性及び操作性をより向上させることができるとともに、部品点数を少なくし、かつ部品を再利用することもできる。   In the bush cutter head of the cord type brush cutter according to claim 1, since the bearing is interposed between the hitting member and the operating member, the hitting member and the operating member can freely move around the axis. It can be rotated. Thereby, only the hitting member can be stopped when the hitting member hits the ground during the mowing operation or when the hitting member contacts the ground. Therefore, wear of the hitting member and reaction from the ground to the hitting member can be further suppressed, and durability and operability can be further improved. Further, the hitting member and the operation member are provided with a plurality of sets of locking claws, and the bearings can be locked by the locking claws. Therefore, a special part for locking the bearing is not required, the number of parts can be reduced, and the striking member and the operation member can be disassembled. Therefore, according to the cutting head of this cord type brush cutter, the durability and operability can be further improved, the number of parts can be reduced, and the parts can be reused.

請求項２に係るコード式刈払機の刈払ヘッドにおいては、打当部材及び操作部材には係止爪によるベアリングの係止を補強するストッパーが設けられているため、打当部材と操作部材との間にベアリングがより強固に装着され、草刈り作業中に係止爪からベアリングが外れるのを防止することができる。   In the bush cutter head of the cord type brush cutter according to claim 2, the stopper member and the operation member are provided with a stopper for reinforcing the locking of the bearing by the locking claw. During this time, the bearing is more firmly mounted, and it is possible to prevent the bearing from being detached from the locking claw during the mowing operation.

請求項３に係るコード式刈払機の刈払ヘッドにおいては、係止爪とストッパーとには係合する凹部と凸部とが設けられているため、ストッパーの脱落を防止することができる。   In the brush cutter head of the cord type brush cutter according to the third aspect, the engaging claw and the stopper are provided with the concave portion and the convex portion to be engaged, so that the stopper can be prevented from falling off.

請求項４に係るコード式刈払機の刈払ヘッドにおいては、ストッパーにはタッピングスクリューをねじ込み可能な取外し穴が設けられている。このため、取外し穴にタッピングスクリューをねじ込むことにより打当部材と操作部材とを簡単に分解することができ、部品交換が容易になるとともに使用可能な部品を再利用し易くなる。   According to a fourth aspect of the present invention, the stopper is provided with a removal hole into which the tapping screw can be screwed. For this reason, by screwing the tapping screw into the removal hole, the striking member and the operation member can be easily disassembled, and the parts can be easily replaced and the usable parts can be easily reused.

請求項５に係るコード式刈払機の刈払ヘッドにおいては、打当部材と操作部材とに、遊嵌される凹条と凸条とが設けられている。このため、打当部材と操作部材との間へのゴミの進入を抑制することができる。また、この凹条及び凸条は軸心回りであって同心円状に設けられているため、打当部材及び操作部材の軸心回りの自由な回動が妨げられることはない。   In the brush cutter head of the cord type brush cutter according to the fifth aspect, the striking member and the operating member are provided with a concave line and a convex line that are loosely fitted. For this reason, the entrance of dust between the hitting member and the operation member can be suppressed. Further, since the concave stripes and the convex stripes are provided around the axis and concentrically, free rotation around the axis of the hitting member and the operation member is not hindered.

実施形態の刈払ヘッドを用いたコード式刈払機の斜視図。The perspective view of the cord type brush cutter using the brush head of an embodiment. 実施形態の刈払ヘッドの分解斜視図。The disassembled perspective view of the brush head of the embodiment. 実施形態の刈払ヘッドの一部断面図。FIG. 3 is a partial cross-sectional view of the brush cutter head according to the embodiment. 実施形態の刈払ヘッドの一部拡大断面図。FIG. 3 is a partially enlarged cross-sectional view of the brush cutter head according to the embodiment. 従来の刈払ヘッドの一部断面図。A partial sectional view of a conventional brush head. 従来の刈払ヘッドの一部断面図。A partial sectional view of a conventional brush head.

本発明に係るコード式刈払機の刈払ヘッドを具体化した実施形態を図面に基づいて以下に説明する。図１は、実施形態の刈払ヘッドを用いたコード式刈払機の斜視図である。このコード式刈払機の操作棹９０の先端部にはギアヘッド９１とカバー９２とが取付けられている。そして、ギアヘッド９１には刈払ヘッド１が回転可能に取付けられている。   An embodiment in which a brush head of a cord type brush cutter according to the present invention is embodied will be described below with reference to the drawings. FIG. 1 is a perspective view of a cord type brush cutter using the brush head of the embodiment. A gear head 91 and a cover 92 are attached to the distal end portion of the operation rod 90 of the cord type brush cutter. The brush head 1 is rotatably attached to the gear head 91.

図２に示すように、刈払ヘッド１は、カバー２、コード３、リール４、打当部材１０、操作部材２０、ベアリング３０、第１ストッパー３５、第２ストッパー４０、スプリング５、刃押え金具６、ハウジング７、及び口金７ａを有している。カバー２は略円盤状をなし、薄肉の有蓋円筒状のハウジング７と着脱可能に組み付けられる。そして、ハウジング７内には、コード３、リール４、操作部材２０、ベアリング３０、第１ストッパー３５、第２ストッパー４０、スプリング５、及び刃押え金具６が収納される。   As shown in FIG. 2, the brush cutting head 1 includes a cover 2, a cord 3, a reel 4, a striking member 10, an operation member 20, a bearing 30, a first stopper 35, a second stopper 40, a spring 5, and a blade pressing metal. 6, a housing 7 and a base 7a. The cover 2 has a substantially disk shape, and is detachably assembled with a thin, covered cylindrical housing 7. In the housing 7, the cord 3, the reel 4, the operation member 20, the bearing 30, the first stopper 35, the second stopper 40, the spring 5, and the blade pressing metal 6 are accommodated.

リール４の外周面にはコード３が巻回され、ハウジング７に取付けられた２つの口金７ａからコード３の先端が導出される。操作部材２０はコード３の長さを調節する役目を果たす。この操作部材２０の一部がカバー２から突出し、その先端部に地面に当接する打当部材１０が組み付けられる。ベアリング３０は打当部材１０と操作部材２０との間に介装され、両者の軸心回りの独立した回動を確保する。また、第１ストッパー３５、及び第２ストッパー４０は、ベアリング３０を打当部材１０と操作部材２０との間に、より強固に装着するものである。さらに、スプリング５は打当部材１０、操作部材２０等をハウジング７と離反する方向に押圧するものであり、刃押え金具６はギアボックス９１に刈払ヘッド１を固着させる場合に使用するものである。   The cord 3 is wound around the outer peripheral surface of the reel 4, and the leading end of the cord 3 is led out from two caps 7 a attached to the housing 7. The operation member 20 serves to adjust the length of the cord 3. A part of the operation member 20 protrudes from the cover 2, and a striking member 10 that comes into contact with the ground is assembled to the tip of the operation member 20. The bearing 30 is interposed between the striking member 10 and the operation member 20, and ensures independent rotation around the axis of both. The first stopper 35 and the second stopper 40 attach the bearing 30 more firmly between the striking member 10 and the operation member 20. Further, the spring 5 presses the striking member 10, the operation member 20, etc. in a direction away from the housing 7, and the blade retainer 6 is used when the brush head 1 is fixed to the gear box 91. is there.

図３及び図４に示すように、打当部材１０は、底部１１と台座部１２とラッチ部１３とからなる。底部１１は円盤状をなし、底部１１の周縁部には凹条１１ａが軸心回りに設けられている。また、凹条１１ａ及びその両側には、小さな凸条１１ｄ，１１ｅ，１１ｆが軸心回りに、かつ同心円状に設けられている。台座部１２は円筒状をなし、底部１１の中央部に一体として設けられている。台座部１２上には、径方向外側に段差１２ａを有して、４個のラッチ部１３が等間隔で同心円状に一体として立設されている。また、ラッチ部１３の先端には径方向外側に突出する係止爪１３ａが形成され、係止爪１３ａの径方向内側面には凹部１３ｂが形成されている。   As shown in FIGS. 3 and 4, the striking member 10 includes a bottom portion 11, a pedestal portion 12, and a latch portion 13. The bottom portion 11 has a disk shape, and a recess 11 a is provided around the axis at the peripheral edge of the bottom portion 11. In addition, small protrusions 11d, 11e, and 11f are provided around the axis 11 and concentrically on both sides of the recess 11a. The pedestal portion 12 has a cylindrical shape and is integrally provided at the center portion of the bottom portion 11. On the pedestal portion 12, a step 12a is provided on the outer side in the radial direction, and four latch portions 13 are erected in a concentric manner at regular intervals. Further, a latching claw 13a that protrudes radially outward is formed at the tip of the latch portion 13, and a recess 13b is formed on the radially inner side surface of the latching claw 13a.

操作部材２０は有底円筒状をなし、略円筒状の円筒部２１と底部２２とラッチ部２３とからなる。底部２２の打当部材１０側には、凸条２２ａが軸心回りに設けられ、打当部材１０の凹条１１ａに遊嵌されている。また、凸条２２ａ及びその両側には、小さな凹条２２ｄ，２２ｅ，２２ｆが軸心回りに、かつ同心円状に設けられている。そして、この凹条２２ｄ，２２ｅ，２２ｆに打当部材１０の凸条１１ｄ，１１ｅ，１１ｆが遊嵌されている。また、底部２２の中央には、打当部材１０の台座部１２、ラッチ部１３が挿入される挿入孔２２ｂが形成されている。底部２２の打当部材１０側と反対側には、径方向内側に段差２２ｃを有して、４個のラッチ部２３が等間隔で同心円状に一体として立設されている。各ラッチ部２３の先端には径方向内側に突出する係止爪２３ａが形成され、係止爪２３ａの径方向外側面には凹部２３ｂが形成されている。   The operation member 20 has a bottomed cylindrical shape, and includes a substantially cylindrical cylindrical portion 21, a bottom portion 22, and a latch portion 23. On the bottom 22 side of the striking member 10, a ridge 22 a is provided around the axis and is loosely fitted to the concave 11 a of the striking member 10. Further, on the ridge 22a and on both sides thereof, small ridges 22d, 22e, and 22f are provided around the axis and concentrically. And the convex strips 11d, 11e, and 11f of the hitting member 10 are loosely fitted to the concave strips 22d, 22e, and 22f. Further, an insertion hole 22b into which the pedestal 12 and the latch 13 of the hitting member 10 are inserted is formed at the center of the bottom 22. On the side opposite to the striking member 10 side of the bottom portion 22, there are steps 22 c on the inner side in the radial direction, and four latch portions 23 are erected integrally and concentrically at equal intervals. A locking claw 23a that protrudes radially inward is formed at the tip of each latch portion 23, and a recess 23b is formed on the radially outer surface of the locking claw 23a.

第１ストッパー３５は円筒状をなし、操作部材２０の円筒部２１の内周面とラッチ部２３との間に嵌入される。第１ストッパー３５の内周面には凸部３５ａが形成され、操作部材２０の凹部２３ｂと係合している。さらに、第１ストッパー３５の上面には、タッピングスクリューをねじ込み可能な取外し穴３５ｂが設けられている。   The first stopper 35 has a cylindrical shape, and is fitted between the inner peripheral surface of the cylindrical portion 21 of the operation member 20 and the latch portion 23. A convex portion 35 a is formed on the inner peripheral surface of the first stopper 35 and is engaged with the concave portion 23 b of the operation member 20. Furthermore, a removal hole 35 b into which a tapping screw can be screwed is provided on the upper surface of the first stopper 35.

第２ストッパー４０は略円柱状をなし、打当部材１０の４個のラッチ部１３の間に嵌入される。第２ストッパー４０の外周面には凸部４０ａが形成され、打当部材１０の凹部１３ｂと係合している。さらに、第２ストッパー４０の上面には、タッピングスクリューをねじ込み可能な取外し穴４０ｂが設けられている。   The second stopper 40 has a substantially cylindrical shape and is fitted between the four latch portions 13 of the hitting member 10. A convex portion 40 a is formed on the outer peripheral surface of the second stopper 40 and is engaged with the concave portion 13 b of the hitting member 10. Furthermore, a removal hole 40b into which a tapping screw can be screwed is provided on the upper surface of the second stopper 40.

上記の構成をした刈払ヘッド１について、打当部材１０、操作部材２０、ベアリング３０、第１ストッパー３５、及び第２ストッパー４０の組み付けについて説明する。操作部材２０の挿入孔２２ｂに打当部材１０の台座部１２、ラッチ部１３を挿入する。そして、操作部材２０側からベアリング３０をラッチ部１３とラッチ部２３との間に挿入すると、まず、ベアリング３０により係止爪１３ａ、２３aが押され、ラッチ部１３、２３が撓んで係止爪１３ａ、２３aが互いに離反する方向に移動する。そして、ベアリング３０が段差１２ａ、２２ｃに達すると、係止爪１３ａ、２３aへの荷重が取り除かれるため、ラッチ部１３、２３の撓みが取り除かれて係止爪１３ａ、２３aが互いに接近する方向に移動して元の位置に戻る。これにより、打当部材１０と操作部材２０との間にベアリング３０が嵌合され、打当部材１０、操作部材２０、及びベアリング３０が組み付けられる。   The assembling of the hitting member 10, the operation member 20, the bearing 30, the first stopper 35, and the second stopper 40 will be described for the brush head 1 having the above-described configuration. The base portion 12 and the latch portion 13 of the striking member 10 are inserted into the insertion hole 22b of the operation member 20. When the bearing 30 is inserted between the latch portion 13 and the latch portion 23 from the operation member 20 side, the latching claws 13a and 23a are first pushed by the bearing 30 and the latch portions 13 and 23 are bent and the latching claws are pushed. 13a and 23a move in directions away from each other. When the bearing 30 reaches the steps 12a and 22c, the load on the locking claws 13a and 23a is removed. Move back to the original position. Thereby, the bearing 30 is fitted between the hitting member 10 and the operation member 20, and the hitting member 10, the operation member 20, and the bearing 30 are assembled.

次に、第１ストッパー３５を操作部材２０の円筒部２１の内周面とラッチ部２３との間に嵌入する。この際、凸部３５ａとラッチ部２３の凹部２３ｂとを係合させる。さらに、第２ストッパー４０を打当部材１０の４個のラッチ部１３の間に嵌入する。この際、凸部４０ａとラッチ部１３の凹部１３ｂとを係合させる。こうして、第１ストッパー３５、及び第２ストッパー４０が組み付けられ、その他、リール４、スプリング５等が組み付けられて刈払ヘッド１の組付けが完成する。   Next, the first stopper 35 is fitted between the inner peripheral surface of the cylindrical portion 21 of the operation member 20 and the latch portion 23. At this time, the convex portion 35 a is engaged with the concave portion 23 b of the latch portion 23. Further, the second stopper 40 is fitted between the four latch portions 13 of the hitting member 10. At this time, the convex portion 40 a and the concave portion 13 b of the latch portion 13 are engaged. Thus, the first stopper 35 and the second stopper 40 are assembled, and in addition, the reel 4, the spring 5 and the like are assembled, and the assembling of the brush head 1 is completed.

実施形態のコード式刈払機の刈払ヘッドにおいては、打当部材１０と操作部材２０との間にベアリング３０が介装されているため、打当部材１０と操作部材２０とは軸心回りに互いに自由に回動可能である。これにより、草刈り作業中に打当部材１０を地面に打ち当てたり、打当部材１０が地面に接触したりした場合には、打当部材１０だけを静止させることができる。そのため、打当部材１０の摩耗、及び地面から打当部材１０への反動をより抑制することができ、耐久性及び操作性をより向上させることができる。また、打当部材１０及び操作部材２０には複数組の係止爪１３ａ、２３ａが設けられ、この係止爪１３ａ、２３ａによりベアリング３０を係止することができる。そのため、ベアリング３０を係止するための特別な部品を必要とせず、部品点数を少なくすることができるうえ、打当部材１０と操作部材２０とを分解することもできる。したがって、このコード式刈払機の刈払ヘッドによれば、耐久性及び操作性をより向上させることができるとともに、部品点数を少なくし、かつ部品を再利用することもできる。   In the bush cutter head of the cord type brush cutter according to the embodiment, since the bearing 30 is interposed between the hitting member 10 and the operating member 20, the hitting member 10 and the operating member 20 are arranged around the axis. They can rotate freely with respect to each other. Thereby, only the hitting member 10 can be made still when the hitting member 10 hits against the ground during mowing work, or when the hitting member 10 contacts the ground. Therefore, wear of the hitting member 10 and reaction from the ground to the hitting member 10 can be further suppressed, and durability and operability can be further improved. Further, the hitting member 10 and the operation member 20 are provided with a plurality of sets of locking claws 13a and 23a, and the bearing 30 can be locked by the locking claws 13a and 23a. Therefore, a special part for locking the bearing 30 is not required, the number of parts can be reduced, and the striking member 10 and the operation member 20 can be disassembled. Therefore, according to the cutting head of this cord type brush cutter, the durability and operability can be further improved, the number of parts can be reduced, and the parts can be reused.

また、このコード式刈払機の刈払ヘッドにおいては、打当部材１０及び操作部材２０には係止爪１３ａ、２３ａによるベアリング３０の係止を補強する第１ストッパー３５、第２ストッパー４０が設けられているため、打当部材１０と操作部材２０との間にベアリング３０がより強固に装着され、草刈り作業中に係止爪１３ａ、２３ａからベアリング３０が外れるのを防止することができる。   Further, in the brush head of this cord type brush cutter, the striking member 10 and the operating member 20 are provided with a first stopper 35 and a second stopper 40 that reinforce the locking of the bearing 30 by the locking claws 13a and 23a. Therefore, the bearing 30 is more firmly mounted between the hitting member 10 and the operation member 20, and the bearing 30 can be prevented from being detached from the locking claws 13a and 23a during the mowing operation.

さらに、このコード式刈払機の刈払ヘッドにおいては、係止爪１３ａ、２３ａと第１ストッパー３５、第２ストッパー４０とには係合する凹部１３ｂ、２３ｂと凸部３５ａ、４０ａが設けられているため、第１ストッパー３５、第２ストッパー４０の脱落を防止することができる。   Further, in the brush head of this cord type brush cutter, the engaging claws 13a and 23a and the first stopper 35 and the second stopper 40 are provided with concave portions 13b and 23b and convex portions 35a and 40a. Therefore, the first stopper 35 and the second stopper 40 can be prevented from falling off.

また、このコード式刈払機の刈払ヘッドにおいては、第１ストッパー３５、第２ストッパー４０にはタッピングスクリューをねじ込み可能な取外し穴３５ｂ、４０ｂが設けられている。このため、取外し穴３５ｂ、４０ｂにタッピングスクリューをねじ込むことにより打当部材１０と操作部材２０とを簡単に分解することができ、部品交換が容易になるとともに使用可能な部品を再利用し易くなる。   Further, in the brush cutter head of the cord type brush cutter, the first stopper 35 and the second stopper 40 are provided with removal holes 35b and 40b into which a tapping screw can be screwed. For this reason, the striking member 10 and the operation member 20 can be easily disassembled by screwing the tapping screws into the removal holes 35b and 40b, so that the parts can be easily replaced and the usable parts can be easily reused. .

さらに、このコード式刈払機の刈払ヘッドにおいては、打当部材１０と操作部材２０とに、遊嵌される凹条１１ａ、２２ｄ、２２ｅ、２２ｆと凸条２２ａ、１１ｄ、１１ｅ、１１ｆａとが設けられている。このため、打当部材１０と操作部材２０との間へのゴミの進入を抑制することができる。また、この凹条１１ａ、２２ｄ、２２ｅ、２２ｆ及び凸条２２ａ、１１ｄ、１１ｅ、１１ｆａは軸心回りであって同心円状に設けられているため、打当部材１０及び操作部材２０の軸心回りの自由な回動が妨げられることはない。   Furthermore, in the brush cutter head of this cord type brush cutter, the concave strips 11a, 22d, 22e, and 22f and the convex strips 22a, 11d, 11e, and 11fa that are loosely fitted to the hitting member 10 and the operation member 20 are provided. Is provided. For this reason, it is possible to suppress dust from entering between the hitting member 10 and the operation member 20. Further, the concave strips 11a, 22d, 22e, 22f and the convex strips 22a, 11d, 11e, 11fa are provided around the shaft center and concentrically. The free rotation is not hindered.

以上、本発明のコード式刈払機の刈払ヘッドを実施形態に即して説明したが、本発明はこれらに制限されるものではなく、本発明の技術的思想に反しない限り、適宜変更して適用できることはいうまでもない。例えば、実施形態において、ラッチ部１３、２３に凹部１３ｂ、２３ｂが設けられ、第１ストッパー３５、第２ストッパー４０に凸部３５ａ、４０ａが設けられているが、ラッチ部１３、２３に凸部を設け、第１ストッパー３５、第２ストッパー４０に凹部を設けてもよい。また、打当部材１０に凹条１１ａが設けられ、操作部材２０に凸条２２ａが設けられているが、打当部材１０に凸条を設け、操作部材２０に凹条を設けてもよい。   As described above, the brush cutter head of the cord type brush cutter according to the present invention has been described according to the embodiments. However, the present invention is not limited to these embodiments, and may be changed as appropriate unless it is contrary to the technical idea of the present invention. Needless to say, this is applicable. For example, in the embodiment, the concave portions 13b and 23b are provided in the latch portions 13 and 23, and the convex portions 35a and 40a are provided in the first stopper 35 and the second stopper 40, but the convex portions are provided in the latch portions 13 and 23. The first stopper 35 and the second stopper 40 may be provided with recesses. Further, the striking member 10 is provided with the concave streaks 11a and the operation member 20 is provided with the convex streaks 22a. However, the striking member 10 may be provided with convex streaks and the operation member 20 may be provided with concave streaks.

１０…打当部材、２０…操作部材、１１，２２…底部、１１ａ，２２ｄ，２２ｅ，２２ｆ…凹条、１１ｄ，１１ｅ，１１ｆ，２２ａ…凸条、１２…台座部、１３，２３…ラッチ部、１３ａ，２３ａ…係止爪、１３ｂ，２３ｂ…凹部、２１…円筒部、３０…ベアリング、３５，４０…ストッパー（３５…第１ストッパー，４０…第２ストッパー）、３５ａ，４０ａ…凸部、３５ｂ，４０ｂ…取外し穴。   DESCRIPTION OF SYMBOLS 10 ... Hitting member, 20 ... Operation member, 11, 22 ... Bottom part, 11a, 22d, 22e, 22f ... Recess, 11d, 11e, 11f, 22a ... Projection, 12 ... Base part, 13, 23 ... Latch part , 13a, 23a ... locking claw, 13b, 23b ... concave portion, 21 ... cylindrical portion, 30 ... bearing, 35, 40 ... stopper (35 ... first stopper, 40 ... second stopper), 35a, 40a ... convex portion, 35b, 40b ... removal holes.

Claims (5)

可撓性のコードを高速回転させて草を刈るコード式刈払機の刈払ヘッドにおいて、
該刈払ヘッドは、地面に当接する打当部材と、コードの長さを調節する操作部材とを有し、
該打当部材と該操作部材との間にはベアリングが介装され、
該打当部材及び該操作部材には、該ベアリングを係止する複数組の係止爪が設けられていることを特徴とするコード式刈払機の刈払ヘッド。 In the brush head of the cord type brush cutter that cuts the grass by rotating the flexible cord at high speed,
The brush cutting head has a striking member that contacts the ground, and an operation member that adjusts the length of the cord,
A bearing is interposed between the striking member and the operation member,
2. A brush cutter head of a cord type brush cutter, wherein the hitting member and the operating member are provided with a plurality of sets of locking claws for locking the bearing. 前記打当部材及び前記操作部材には、前記係止爪による前記ベアリングの係止を補強するストッパーが設けられていることを特徴とする請求項１記載のコード式刈払機の刈払ヘッド。   2. The cord brush trimmer head according to claim 1, wherein the hitting member and the operation member are provided with stoppers that reinforce the latching of the bearing by the latching claws. 前記係止爪と前記ストッパーとには、係合する凹部と凸部とが設けられていることを特徴とする請求項２記載のコード式刈払機の刈払ヘッド。   The cord type brush cutter according to claim 2, wherein the engaging claw and the stopper are provided with a concave portion and a convex portion to be engaged. 前記ストッパーには、タッピングスクリューをねじ込み可能な取外し穴が設けられていることを特徴とする請求項２又は３記載のコード式刈払機の刈払ヘッド。   4. The cord brush cutter according to claim 2, wherein the stopper is provided with a removal hole into which a tapping screw can be screwed. 前記打当部材と前記操作部材とには、軸心回りであって同心円状に、遊嵌される凹条と凸条とが設けられていることを特徴とする請求項１乃至４記載のコード式刈払機の刈払ヘッド。   The cord according to any one of claims 1 to 4, wherein the hitting member and the operating member are provided with concave and convex ridges that are loosely fitted around a shaft center and concentrically. Brush cutter head.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62248414A (en) * 1986-04-22 1987-10-29 スタ−テング工業株式会社 Rotary cutter of reaper
JP2007195403A (en) * 2006-01-23 2007-08-09 Viv Engineering Inc Brush cutter
JP2009178112A (en) * 2008-01-31 2009-08-13 Isao Kohama Rotary case equipped with delivery mechanism of nylon cutter of mowing machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62248414A (en) * 1986-04-22 1987-10-29 スタ−テング工業株式会社 Rotary cutter of reaper
JP2007195403A (en) * 2006-01-23 2007-08-09 Viv Engineering Inc Brush cutter
JP2009178112A (en) * 2008-01-31 2009-08-13 Isao Kohama Rotary case equipped with delivery mechanism of nylon cutter of mowing machine

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