JP2014128230A - Grass mower blade-attaching structure, and mowing blade - Google Patents

Grass mower blade-attaching structure, and mowing blade Download PDF

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JP2014128230A
JP2014128230A JP2012288081A JP2012288081A JP2014128230A JP 2014128230 A JP2014128230 A JP 2014128230A JP 2012288081 A JP2012288081 A JP 2012288081A JP 2012288081 A JP2012288081 A JP 2012288081A JP 2014128230 A JP2014128230 A JP 2014128230A
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cutting blade
blade
lock pin
mower
rotary stay
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Shinichiro Kawasaki
真一郎 川崎
Yukihiko Gondo
幸彦 権藤
Katsuhisa Ikeda
克久 池田
Soichiro Sato
壮一郎 佐藤
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Chikusui Canycom Inc
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Chikusui Canycom Inc
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Abstract

PROBLEM TO BE SOLVED: To provide a grass mower blade-attaching structure capable of simply and quickly performing replacement work of a mowing blade without a tool, and to provide a blade which can be used two or more times with one mowing blade.SOLUTION: In a mowing blade-attaching structure, a mowing blade 3 is removably attached to a tip of a rotary stay 2 driven to rotate by a motor of a grass mower 1. The rotary stay 2 is provided with an insert mounting part 21 at the tip for slidably inserting an attaching part 31 of the mowing blade 3 in the longitudinal direction of the rotary stay 2. The rotary stay 2 is provided with a lock pin-mounting hole 22 for inserting a lock pin 4 penetrating a vertical wall of the insert mounting part 21. The mowing blade 3 is like a flat plate, a mounting part 32 is provided with a through hole 33 for inserting the lock pin 4 and a slit 34 narrower than a bore diameter of the through hole 33 is formed from the through hole 33 along the insert direction. The lock pin is provided with a groove part 41 able to be inserted in the slit 34 to engage therewith.

Description

本発明は、草刈機の刈刃取付構造及び刈刃に関する。   The present invention relates to a cutting blade mounting structure and a cutting blade of a mower.

従来、草刈機の刈刃取付構造及び刈刃として特許文献１に記載の技術が公知になっている。
この草刈機の刈刃取付構造は、図１５、１６に示すように、刈刃（１）の取付部（２）に取付ボルト（３）を挿通する取付穴（４）を形成し、この取付穴（４）の外周部に下側へ向けて突出する凸条部（５）を形成して、この取付部（５）に取付ボルト（３）のボルト頭部（６）を受けて回転ステイ（７）の先端に締付け固定可能としたものであった。 Conventionally, the technique described in Patent Document 1 has been publicly known as a cutting blade mounting structure and a cutting blade of a mower.
As shown in FIGS. 15 and 16, the mowing blade mounting structure of this mower has a mounting hole (4) through which the mounting bolt (3) is inserted in the mounting portion (2) of the cutting blade (1). A protrusion (5) projecting downward is formed on the outer peripheral portion of the hole (4), and the bolt head (6) of the mounting bolt (3) is received by the mounting portion (5). It was possible to fasten and fix to the tip of (7).

特開２００９−２８４８１８号公報JP 2009-284818 A

しかしながら、従来例の草刈機の刈刃取付構造にあっては、刈刃（１）の交換やメンテナンス時には、刈刃（１）が回転ステイ（７）の先端に取付ボルト（３）により締結固定されているため、草刈機底部の狭い空間での工具を用いた締結作業が必要で、交換作業が困難かつ面倒であるという問題があった。
また、刈刃（１）には刃縁（８）が１箇所のみであるため、一回のみの使用に限られるとう問題があった。 However, in the cutting blade mounting structure of the conventional mower, when the cutting blade (1) is replaced or maintained, the cutting blade (1) is fastened and fixed to the tip of the rotary stay (7) by the mounting bolt (3). Therefore, a fastening operation using a tool in a narrow space at the bottom of the mower is necessary, and there is a problem that the replacement operation is difficult and troublesome.
Further, since the cutting blade (1) has only one edge (8), there is a problem that it is limited to one-time use.

本発明の解決しようとする課題は、刈刃の交換作業に工具を必要とすることなく簡単かつ迅速に行うことができる草刈機の刈刃取付構造、及び１本の刈刃で複数回の使用が可能な刈刃を提供することにある。   The problem to be solved by the present invention is that the cutting blade mounting structure of a mower can be easily and quickly performed without the need for a tool for exchanging the cutting blade, and the use of a single cutting blade multiple times. It is to provide a cutting blade capable of.

上記課題を解決するため請求項１記載の草刈機の刈刃取付構造は、草刈機の原動機により回転駆動する回転ステイの先端に刈刃を着脱可能に取り付ける刈刃取付構造であって、
前記回転ステイは、その先端に刈刃の取付部を回転ステイの長手方向に沿って摺動自在に差し込むための差込装着部を有し、
前記回転ステイには、差込装着部の上下壁を貫通してロックピンを差し込むロックピン装着孔を有し、
前記刈刃は平板状をなし、前記取付部には、前記ロックピンを差し込むための貫通孔を有し、該貫通孔から差込方向に沿って貫通孔の口径より幅狭のスリットが形成され、
前記ロックピンには、前記スリット内に差込係合可能な溝部を備えていることを特徴とする手段とした。 In order to solve the above-mentioned problem, the cutting blade mounting structure of the mower according to claim 1 is a cutting blade mounting structure in which the cutting blade is detachably attached to the tip of the rotary stay that is rotationally driven by the prime mover of the mower.
The rotary stay has an insertion mounting portion for inserting a mounting portion of the cutting blade at the tip thereof in a slidable manner along the longitudinal direction of the rotary stay,
The rotary stay has a lock pin mounting hole for inserting a lock pin through the upper and lower walls of the insertion mounting portion,
The cutting blade has a flat plate shape, and the attachment portion has a through-hole for inserting the lock pin, and a slit narrower than the diameter of the through-hole is formed along the insertion direction from the through-hole. ,
The lock pin is provided with a groove that can be inserted and engaged in the slit.

また、請求項２記載の草刈機の刈刃取付構造は、請求項１記載の草刈機の刈刃取付構造において、
前記ロックピンにはロックピンの溝部が刈刃の取付部と一致した状態で回転ステイにおける差込装着部の外面に当接係止する頭部を有することを特徴とする手段とした。 Further, the cutting blade mounting structure of the mower according to claim 2 is the cutting blade mounting structure of the mower according to claim 1,
The lock pin has a head that abuts and locks against the outer surface of the insertion mounting portion of the rotary stay in a state where the groove portion of the lock pin coincides with the attachment portion of the cutting blade.

また、請求項３記載の草刈機の刈刃取付構造は、請求項１又は２に記載の草刈機の刈刃取付構造において、
前記刈刃は、刃部の両側縁部に刈刃の表裏を差し替えて使用可能な刃縁を有することを特徴とする手段とした。 Further, the mowing blade mounting structure of the mower according to claim 3 is the mowing blade mounting structure of the mower according to claim 1 or 2,
The cutting blade has a blade edge that can be used by replacing the front and back of the cutting blade on both side edge portions of the blade portion.

また、請求項４記載の草刈機の刈刃取付構造は、請求項１又は２に記載の草刈機の刈刃取付構造において、
前記刈刃は、取付部の両端に刈刃の前後を差し替えて使用可能な刃縁を有する刃部を備え、前記スリットが前記貫通孔を中心としてそれぞれ両刃部方向ヘ向けて形成されていることを特徴とする手段とした。 Further, the mowing blade mounting structure of the mower according to claim 4 is the mowing blade mounting structure of the mower according to claim 1 or 2,
The said cutting blade is provided with the blade part which has the blade edge which can be used by replacing the front and back of the cutting blade in the both ends of an attachment part, and the said slit is formed toward the both blade part direction centering on the said through-hole, respectively. It was set as the characteristic feature.

また、請求項５記載の草刈機の刈刃取付構造は、請求項４記載の草刈機の刈刃取付構造において、
前記刈刃は、両刃部の両側縁部に刈刃の表裏を差し替えて使用可能な刃縁を有することを特徴とする手段とした。 Further, the cutting blade mounting structure of the mower according to claim 5 is the cutting blade mounting structure of the mower according to claim 4,
The cutting blade has a blade edge that can be used by replacing the front and back of the cutting blade on both side edge portions of both blade portions.

また、請求項６記載の刈刃は、草刈機の原動機により回転駆動する回転ステイの先端に交換可能に取り付けて使用される刈刃であって、
前記刈刃における刃部の両側縁部に刈刃の表裏を差し替えて使用可能な刃縁を有することを特徴とする手段とした。 The cutting blade according to claim 6 is a cutting blade that is used by being exchangeably attached to the tip of a rotary stay that is rotationally driven by a prime mover of a mower,
The cutting blade has a blade edge that can be used by replacing the front and back of the cutting blade on both side edges of the blade portion.

また、請求項７記載の刈刃は、草刈機の原動機により回転駆動する回転ステイの先端に交換可能に取り付けて使用される刈刃であって、
前記刈刃における回転ステイへの取付部を中心としてその両端には刃縁を有する刃部を備えることを特徴とする手段とした。 Further, the cutting blade according to claim 7 is a cutting blade used by being exchangeably attached to the tip of a rotary stay that is rotationally driven by a prime mover of a mower,
The cutting blade is provided with a blade portion having a blade edge at both ends with the attachment portion to the rotary stay as the center.

また、請求項８記載の刈刃は、請求項７記載の刈刃において、
前記両刃部の両側縁部に刈刃の表裏を差し替えて使用可能な刃縁を有することを特徴とする手段とした。 Further, the cutting blade according to claim 8 is the cutting blade according to claim 7,
The means has a blade edge that can be used by replacing the front and back of the cutting blade on both side edge portions of the both blade portions.

請求項１記載の草刈機の刈刃取付構造明では、上述のように、回転ステイは、その先端に刈刃の取付部を回転ステイの長手方向に沿って摺動自在に差し込むための差込装着部を有し、回転ステイには、差込装着部の上下壁を貫通してロックピンを差し込むロックピン装着孔を有し、刈刃は平板状をなし、取付部には、ロックピンを差し込むための貫通孔を有し、該貫通孔から差込方向に沿って貫通孔の口径より幅狭のスリットが形成され、ロックピンには、スリット内に差込係合可能な溝部を備えた構成としたことで、刈刃の取付部を回転ステイの差込装着部内に差し込み、ロックピンを回転ステイのロックピン装着孔から刈刃の貫通孔を貫通して装着した後、刈刃を差込装着部から抜く方向に引き戻すことにより、ロックピンの溝部がスリットの内底部まで差し込まれ、これにより、ロックピンの抜け落ちが防止された状態で刈刃の取り付けが完了する。
この状態で回転ステイが回転すると、刈刃は遠心力でスリットの内定部に圧接した状態に維持されるので、刈刃が抜け落ちることはない。
なお、刈刃の交換は、回転ステイの差込装着部内に刈刃を押し込んで刈刃の貫通孔と回転ステイのロックピン装着孔の位置を一致させてロックピンを抜き取ることにより、回転ステイの差込装着部から刈刃を抜き取ることができる。
従って、刈刃の交換作業に工具を必要とすることなくロックピンの着脱操作のみで、簡単かつ迅速に行うことができるようになるという効果が得られる。 In the cutting blade mounting structure of the mower according to claim 1, as described above, the rotary stay is an insertion for inserting the mounting portion of the cutting blade into the tip of the rotary stay slidably along the longitudinal direction of the rotary stay. The rotary stay has a lock pin mounting hole for inserting the lock pin through the upper and lower walls of the insertion mounting part, the cutting blade has a flat plate shape, and the mounting part has a lock pin. A slit having a through hole for insertion, narrower than the diameter of the through hole is formed along the insertion direction from the through hole, and the lock pin is provided with a groove portion that can be inserted and engaged in the slit. With this configuration, the cutting blade mounting part is inserted into the insertion mounting part of the rotary stay, the lock pin is inserted from the lock pin mounting hole of the rotary stay through the through hole of the cutting blade, and then the cutting blade is inserted. The groove of the lock pin is Is inserted to an inner bottom portion of the bets, thereby, the mounting of the cutting blade in a state of falling out is prevented in the locking pin is completed.
When the rotary stay rotates in this state, the cutting blade is maintained in pressure contact with the inner fixed portion of the slit by centrifugal force, so that the cutting blade does not fall off.
To replace the cutting blade, push the cutting blade into the insertion mounting part of the rotary stay, align the position of the through hole of the cutting blade with the position of the lock pin mounting hole of the rotary stay, and remove the lock pin. The cutting blade can be extracted from the insertion mounting part.
Therefore, it is possible to obtain an effect that it can be easily and quickly performed only by attaching and detaching the lock pin without requiring a tool for exchanging the cutting blade.

請求項２記載の草刈機の刈刃取付構造では、上述のように、ロックピンにはロックピンの溝部が刈刃の取付部と一致した状態で回転ステイにおける差込装着部の外面に当接係止する頭部を有するため、ロックピンを差し込む操作のみで、ロックピンの溝部と刈刃の取付部を一致させることができ、刈刃の交換作業を容易かつ迅速に行えるようになる。   In the mower cutting blade mounting structure according to claim 2, as described above, the lock pin contacts the outer surface of the insertion mounting portion of the rotary stay in a state where the groove portion of the lock pin coincides with the mounting portion of the cutting blade. Since it has the head to be locked, only by inserting the lock pin, the groove portion of the lock pin and the mounting portion of the cutting blade can be matched, and the cutting blade can be replaced easily and quickly.

請求項３記載の草刈機の刈刃取付構造では、上述のように、刈刃は、刃部の両側縁部に刈刃の表裏を差し替えて使用可能な刃縁を有するため、刈刃の表裏の差し替えで、１本の刈刃で２回の使用が可能になる。   In the cutting blade mounting structure for a mower according to claim 3, as described above, the cutting blade has blade edges that can be used by replacing the front and back of the cutting blade on both side edges of the blade portion. By replacing this, it is possible to use it twice with a single cutting blade.

請求項４記載の草刈機の刈刃取付構造では、上述のように、刈刃は、取付部の両端に刈刃の前後を差し替えて使用可能な刃縁を有する刃部を備え、前記スリットが前記貫通孔を中心としてそれぞれ両刃部方向に向けて形成された構成とすることで、刈刃の表裏の差し替えと、前後の差し替えにより、１本の刈刃で４回の使用が可能になる。   In the cutting blade mounting structure for a mower according to claim 4, as described above, the cutting blade includes a blade portion having a blade edge that can be used by replacing the front and rear of the cutting blade at both ends of the mounting portion, and the slit is By adopting a configuration in which the blades are formed in the direction of the two blades around the through hole, the cutting blade can be used four times with one cutting blade by replacing the front and back of the cutting blade and front and back.

請求項５記載の草刈機の刈刃取付構造では、上述のように、刈刃は、両刃部の両側縁部に刈刃の表裏を差し替えて使用可能な刃縁を有するため、刈刃の表裏の差し替えで、１本の刈刃で２回の使用が可能になる。   In the cutting blade mounting structure for a mower according to claim 5, as described above, the cutting blade has a blade edge that can be used by replacing the front and back of the cutting blade on both side edges of both blade portions. By replacing this, it is possible to use it twice with a single cutting blade.

請求項６記載の刈刃では、上述のように、刈刃は、両刃部の両側縁部に刈刃の表裏を差し替えて使用可能な刃縁を有する構成としたことで、刈刃の表裏の差し替えで、１本の刈刃で２回の使用が可能になる。   In the cutting blade according to claim 6, as described above, the cutting blade is configured to have usable blade edges by replacing the front and back of the cutting blades on both side edge portions of the both blade portions. By replacement, one cutting blade can be used twice.

請求項７記載の刈刃では、上述のように、刈刃における回転ステイへの取付部を中心としてその両端には刃縁を有する刃部を備えることで、刈刃の前後の差し替えで、１本の刈刃で２回の使用が可能になる。   In the cutting blade according to claim 7, as described above, by providing blade portions having blade edges at both ends with the attachment portion to the rotary stay in the cutting blade as the center, it is possible to replace the cutting blade before and after the cutting blade by 1 A book blade can be used twice.

請求項８記載の刈刃では、上述のように、両刃部の両側縁部に刈刃の表裏を差し替えて使用可能な刃縁を有することで、刈刃の表裏の差し替えと前後の差し替えにより、１本の刈刃で４回の使用が可能になる。   In the cutting blade according to claim 8, as described above, by having a blade edge that can be used by replacing the front and back of the cutting blade on both side edges of both blade portions, by replacing the front and back of the cutting blade and the front and back, One cutting blade can be used four times.

実施例１の草刈機への刈刃の取り付け状態を示す斜視図である。It is a perspective view which shows the attachment state of the cutting blade to the mower of Example 1. FIG. 実施例１の草刈機の刈刃取付構造を示す斜視図である。It is a perspective view which shows the cutting blade attachment structure of the mower of Example 1. FIG. 実施例１の草刈機の刈刃取付構造を示す縦断面図である。It is a longitudinal cross-sectional view which shows the cutting blade attachment structure of the mower of Example 1. FIG. 実施例１における刈刃を示す平面図である。1 is a plan view showing a cutting blade in Example 1. FIG. 実施例１におけるロックピンを示す正面図である。It is a front view which shows the lock pin in Example 1. FIG. 実施例１におけるロックピンと刈刃との係合状態を示す説明図である。It is explanatory drawing which shows the engagement state of the lock pin and cutting blade in Example 1. FIG. 実施例２における刈刃を示す平面図である。6 is a plan view showing a cutting blade in Embodiment 2. FIG. 実施例２における刈刃の取り付け構造を示す斜視図である。FIG. 6 is a perspective view illustrating a mounting structure of a cutting blade in Example 2. 実施例２における刈刃の取り付け構造を示す断面図である。FIG. 6 is a cross-sectional view showing a mounting structure of a cutting blade in Example 2. 実施例３における刈刃を示す平面図である。10 is a plan view showing a cutting blade in Example 3. FIG. 実施例３における刈刃の取り付け構造を示す斜視図である。FIG. 6 is a perspective view illustrating a mounting structure of a cutting blade in Example 3. 実施例３における刈刃の取り付け構造を示す断面図である。FIG. 6 is a cross-sectional view illustrating a mounting structure of a cutting blade in Example 3. 実施例３の刈刃の変形例を示す平面図である。FIG. 10 is a plan view illustrating a modification of the cutting blade according to the third embodiment. 実施例３の刈刃の変形例を示すは平面図である。FIG. 9 is a plan view showing a modification of the cutting blade according to the third embodiment. 従来例の刈刃の取付構造を示す分解斜視図である。It is a disassembled perspective view which shows the attachment structure of the cutting blade of a prior art example. 従来例の刈刃の取付構造を示す断面図である。It is sectional drawing which shows the attachment structure of the cutting blade of a prior art example.

以下にこの発明の実施例を図面に基づいて説明する。   Embodiments of the present invention will be described below with reference to the drawings.

この草刈機の刈刃取付構造は、図１〜５に示すように、草刈機１と、回転ステイ２と、刈刃３と、ロックピン４と、を主な構成として備えている。   As shown in FIGS. 1 to 5, the mowing blade mounting structure of the mower includes a mower 1, a rotary stay 2, a mowing blade 3, and a lock pin 4 as main components.

さらに詳述すると、前記回転ステイ２は、図２に示すように、草刈機１の原動機によりその中央軸部を中心として平面視で時計方向に回転駆動されるものでその両端に取り付けた刈刃３で草刈が行われる。   More specifically, as shown in FIG. 2, the rotary stay 2 is rotationally driven clockwise in plan view around the central shaft portion by the prime mover of the mower 1, and the cutting blades attached to both ends thereof. At 3 the mowing is done.

前記刈刃３は、回転ステイ２の先端に交換可能に取り付けて使用されるもので、図４に示すように、平板状をなし、回転ステイ２の両端に取り付ける取付部３１と刃部３２を備え、刃部３２の両側縁部に刈刃３の表裏を差し替えて使用可能な刃縁３ａ、３ｂを有する。   The cutting blade 3 is used by being attached to the tip of the rotary stay 2 so as to be replaceable. As shown in FIG. 4, the cutting blade 3 has a flat plate shape, and has an attachment portion 31 and a blade portion 32 attached to both ends of the rotary stay 2. And blade edges 3 a and 3 b that can be used by replacing the front and back of the cutting blade 3 at both side edges of the blade portion 32.

前記回転ステイ２は、図３に示すように、その先端部に刈刃３の取付部３１を回転ステイ２の長手方向に沿って摺動自在に差し込むための差込装着部２１を備えている。
また、回転ステイ２の差込装着部２１には、その上下壁２１ａ、２１ｂを貫通してロックピン４を差し込むロックピン装着孔２２を備えている。 As shown in FIG. 3, the rotary stay 2 is provided with an insertion mounting portion 21 for inserting the attachment portion 31 of the cutting blade 3 slidably along the longitudinal direction of the rotary stay 2 at the tip thereof. .
Further, the insertion mounting portion 21 of the rotary stay 2 is provided with a lock pin mounting hole 22 through which the lock pin 4 is inserted through the upper and lower walls 21a and 21b.

前記刈刃３の取付部３１には、図４に示すように、ロックピン４を差し込むための貫通孔３３を有し、該貫通孔３３から差込方向に沿って貫通孔３３の口径より幅狭のスリット３４が形成されている。   As shown in FIG. 4, the attachment portion 31 of the cutting blade 3 has a through hole 33 for inserting the lock pin 4, and is wider than the diameter of the through hole 33 along the insertion direction from the through hole 33. A narrow slit 34 is formed.

前記ロックピン４には、図５、６に示すように、スリット３４内に差込係合可能な環状の溝部４１を備えている。
また、ロックピン４には、図３に示すように、ロックピン４の溝部４１が刈刃３の取付部３１と一致した状態で回転ステイ２における差込装着部２１の上面に当接係止する頭部４２を有している。 As shown in FIGS. 5 and 6, the lock pin 4 is provided with an annular groove 41 that can be inserted and engaged in the slit 34.
Further, as shown in FIG. 3, the lock pin 4 is in contact with and locked to the upper surface of the insertion mounting portion 21 in the rotary stay 2 with the groove portion 41 of the lock pin 4 aligned with the attachment portion 31 of the cutting blade 3. It has a head 42 to be used.

また、図２、３、５に示すように、回転ステイ２における差込装着部２１の上面には、ロックピン４の頭部４２を差し込む円筒部２３を有し、頭部４２の外周の環状溝部には円筒部２３の内面と頭部４２の外周面との間をシールしてゴミの侵入を阻止するオーリング４３が装着されている。
また、回転ステイ２に於ける差込装着部２１の下壁２１ｂを回転ステイ２の回転方向斜め上方へ向けて延長させた防護柵２１ｃを形成させている。この下壁２１ｂと防護柵２１ｃは、上壁２１ａより板厚となしている。 2, 3, and 5, the upper surface of the insertion mounting portion 21 in the rotary stay 2 has a cylindrical portion 23 into which the head portion 42 of the lock pin 4 is inserted. An O-ring 43 that seals between the inner surface of the cylindrical portion 23 and the outer peripheral surface of the head portion 42 to prevent entry of dust is attached to the groove portion.
Further, a protective fence 21 c is formed by extending the lower wall 21 b of the insertion mounting portion 21 in the rotary stay 2 toward the obliquely upward direction of the rotary stay 2. The lower wall 21b and the protective fence 21c are made thicker than the upper wall 21a.

次に、この実施例１の作用を説明する。
＜刈刃の取り付けについて＞
回転ステイ２の両端に対する刈刃３の取り付けは、先ず、図６（ｃ）、（ｂ）に示すように、刈刃３の取付部３１を回転ステイ２の差込装着部２１内に差し込み、ロックピン４を回転ステイ２のロックピン装着孔２２から刈刃３の貫通孔３３を貫通して装着した後、図６（ａ）に示すように、刈刃３を差込装着部２１から抜く方向に引き戻すことにより、図３に示すように、ロックピン４の溝部４１がスリット３４の内底部まで差し込まれ、これにより、ロックピン４の抜け落ちが防止された状態で刈刃の取り付けが完了する。
この状態で回転ステイ２が回転すると、刈刃３は遠心力でスリット３４の内定部に圧接した状態に維持されるので、刈刃３が抜け落ちることはなく、一方の刃縁３ａで草刈を行うことができる。 Next, the operation of the first embodiment will be described.
<Attaching the cutting blade>
As shown in FIGS. 6C and 6B, first, the cutting blade 3 is attached to both ends of the rotary stay 2 by inserting the mounting portion 31 of the cutting blade 3 into the insertion mounting portion 21 of the rotary stay 2. After the lock pin 4 is mounted through the lock pin mounting hole 22 of the rotary stay 2 through the through hole 33 of the cutting blade 3, the cutting blade 3 is pulled out from the insertion mounting portion 21 as shown in FIG. By pulling back in the direction, as shown in FIG. 3, the groove 41 of the lock pin 4 is inserted to the inner bottom of the slit 34, whereby the attachment of the cutting blade is completed in a state in which the lock pin 4 is prevented from coming off. .
When the rotary stay 2 rotates in this state, the cutting blade 3 is maintained in pressure contact with the inner fixed portion of the slit 34 by centrifugal force, so that the cutting blade 3 does not fall out and mowing is performed with one blade edge 3a. be able to.

＜刈刃の取り外しについて＞
刈刃３の交換は、以上とは逆に、図６（ｂ）に示すように、回転ステイ２の差込装着部２１内に刈刃３を押し込んで刈刃３の貫通孔３３と回転ステイ２のロックピン装着孔２２の位置を一致させた状態で、図（ｃ）に示すように、ロックピン４を抜き取ることにより、回転ステイ２の差込装着部２１から刈刃３を簡単に抜き取ることができる。 <Removal of cutting blade>
As shown in FIG. 6 (b), the cutting blade 3 is replaced, as shown in FIG. 6B, by pushing the cutting blade 3 into the insertion mounting portion 21 of the rotary stay 2 and the through hole 33 of the cutting blade 3 and the rotary stay. In the state where the positions of the two lock pin mounting holes 22 are matched, the cutting blade 3 is easily extracted from the insertion mounting portion 21 of the rotary stay 2 by extracting the lock pin 4 as shown in FIG. be able to.

＜刈刃の表裏差し替え＞
上記抜き取った刈刃３の表裏を差し替えて回転ステイ２に取り付けることにより、もう一方の刃縁３ｂで２度目の草刈を行うことができる。 <Replacement of the cutting blade front and back>
By replacing the front and back of the extracted cutting blade 3 and attaching it to the rotary stay 2, the second cutting edge 3b can be used for the second mowing.

次に、この実施例１の効果を説明する。
以上詳細に説明したように、実施例１の草刈機の刈刃取付構造では、刈刃３の交換作業に工具を必要とすることなくロックピン４の着脱操作のみで、簡単かつ迅速に行うことができる。
これにより、作業効率の向上が図れるようになるという効果が得られる。 Next, the effect of the first embodiment will be described.
As explained in detail above, in the cutting blade mounting structure of the mower according to the first embodiment, it is easy and quick to perform the operation of replacing the cutting blade 3 without the need for a tool and only by attaching / detaching the lock pin 4. Can do.
Thereby, the effect that improvement of working efficiency can be aimed at is acquired.

また、ロックピン４にはロックピン４の溝部４１が刈刃３の取付部３１と一致した状態で回転ステイ２における差込装着部２１の上壁２１ａに当接係止する頭部４２を有するため、ロックピン４を差し込む操作のみで、ロックピン４の溝部４１と刈刃の３取付部３１を一致させることができ、これにより、刈刃３の交換作業を容易かつ迅速に行えるようになる。   Further, the lock pin 4 has a head portion 42 that contacts and locks the upper wall 21a of the insertion mounting portion 21 in the rotary stay 2 in a state where the groove portion 41 of the lock pin 4 coincides with the attachment portion 31 of the cutting blade 3. Therefore, the groove 41 of the lock pin 4 and the three attachment portions 31 of the cutting blade can be made to coincide with each other only by inserting the lock pin 4, thereby making it possible to easily and quickly replace the cutting blade 3. .

また、刈刃３は、刃部３２の両側縁部に刈刃３の表裏を差し替えて使用可能な刃縁３ａ、３ｂを有するため、１本の刈刃３で２回の使用が可能になる。
これにより、ランニングコストの低減が可能になる。 Further, since the cutting blade 3 has blade edges 3a and 3b that can be used by replacing the front and back of the cutting blade 3 on both side edges of the blade portion 32, the single cutting blade 3 can be used twice. .
As a result, the running cost can be reduced.

また、回転ステイ２における差込装着部２１の上面には、ロックピン４の頭部４２を差し込む円筒部２３を有し、頭部４２の外周の環状溝部には円筒部２３の内面と頭部４２の外周面との間をシールしてゴミの侵入を阻止するオーリング４３が装着されているため、円筒部２３により頭部４２を衝撃から保護することができる。また、シールリング４３により、ゴミの侵入を阻止することができる。   Further, a cylindrical portion 23 into which the head portion 42 of the lock pin 4 is inserted is provided on the upper surface of the insertion mounting portion 21 in the rotary stay 2, and the inner surface and the head portion of the cylindrical portion 23 are provided in the annular groove portion on the outer periphery of the head portion 42. Since the O-ring 43 that seals between the outer peripheral surfaces of 42 and prevents entry of dust is mounted, the head portion 42 can be protected from impact by the cylindrical portion 23. In addition, the seal ring 43 can prevent entry of dust.

また、回転ステイ２に於ける差込装着部２１の下壁２１ｂを回転ステイ２の回転方向斜め上方へ向けて延長させた防護柵２１ｃにより、回転ステイ２の差込装着部２１の摩耗や破損を防止することができる。また、防護柵２１ｃの傾斜により、衝撃を緩和することができるようになる。   In addition, the wear and breakage of the insertion mounting portion 21 of the rotary stay 2 by the protective fence 21c in which the lower wall 21b of the insertion mounting portion 21 in the rotary stay 2 is extended obliquely upward in the rotational direction of the rotary stay 2. Can be prevented. In addition, the impact can be mitigated by the inclination of the protective fence 21c.

次に、他の実施例について説明する。この他の実施例の説明にあたっては、前記実施例１と同様の構成部分については図示を省略し、もしくは同一の符号を付けてその説明を省略し、相違点についてのみ説明する。   Next, another embodiment will be described. In the description of the other embodiments, the same components as those of the first embodiment are not shown, or the same reference numerals are given and the description thereof is omitted, and only the differences are described.

この実施例２は、実施例１における刈刃３の変形例を示すものであり、図７〜９に示すように、この実施例２の刈刃３は、取付部３１の両端に刈刃３の前後を差し替えて使用可能な刃縁３ａ、３ｃを有する刃部３２、３２を備え、スリット３３が貫通孔３３を中心としてそれぞれ両刃部２２、２２方向に向けて形成された構成としたものである。
従って、この実施例２の刈刃３によれば、刈刃３の前後を差し替えることで、１本の刈刃３で２回の使用が可能になる。 The second embodiment shows a modification of the cutting blade 3 in the first embodiment. As shown in FIGS. 7 to 9, the cutting blade 3 of the second embodiment has the cutting blade 3 at both ends of the attachment portion 31. Are provided with blade portions 32, 32 having blade edges 3a, 3c that can be used by replacing the front and rear, and a slit 33 is formed in the direction of both blade portions 22, 22 around the through-hole 33, respectively. is there.
Therefore, according to the cutting blade 3 of the second embodiment, the cutting blade 3 can be used twice by replacing the front and rear of the cutting blade 3.

この実施例３の刈刃３は、実施例２における刈刃３の変形例を示すもので、図１０〜１２に示すように、両刃部３２、３２の両側縁部に刈刃３の表裏を差し替えて使用可能な刃縁３ａ、３ｂ、３ｃ、３ｄを有する構成としたものである。   The cutting blade 3 according to the third embodiment is a modification of the cutting blade 3 according to the second embodiment. As illustrated in FIGS. 10 to 12, the front and back of the cutting blade 3 are attached to both side edges of the both blade portions 32 and 32. The blade edges 3a, 3b, 3c, and 3d that can be used by replacement are used.

従って、この実施例３の刈刃３によれば、刈刃３の表裏の差し替えと前後の差し替えにより、１本の刈刃で４回の使用が可能になる。
なお、図１３、１４にこの実施例３の刈刃３の刃縁を傾斜させた変形例を示す。 Therefore, according to the cutting blade 3 of the third embodiment, the cutting blade 3 can be used four times with one cutting blade by replacing the front and back of the cutting blade 3 and the front and rear.
13 and 14 show a modification in which the blade edge of the cutting blade 3 of the third embodiment is inclined.

以上本実施例を説明してきたが、本発明は上述の実施例に限られるものではなく、本発明の要旨を逸脱しない範囲の設計変更等があっても、本発明に含まれる。   Although the present embodiment has been described above, the present invention is not limited to the above-described embodiment, and design changes and the like within a scope not departing from the gist of the present invention are included in the present invention.

例えば、実施例では、刈刃３の取り付け構造として、ロックピン４による場合を示したが、ボルト等により締結固定するようにしてもよい。   For example, in the embodiment, the case where the lock pin 4 is used as the attachment structure of the cutting blade 3 is shown, but it may be fastened and fixed by a bolt or the like.

また、実施例１では、刈刃３の刃部３２の両側縁部に刈刃３の表裏を差し替えて使用可能な刃縁３ａ、３ｂを有する構成としたが、刃縁は一方だけでもよい。   Moreover, in Example 1, although it was set as the structure which has the blade edges 3a and 3b which can be used by replacing the front and back of the cutting blade 3 in the both-sides edge part of the blade part 32 of the cutting blade 3, only one blade edge may be sufficient.

１ 草刈機
２ 回転ステイ
２１ 差込装着部
２１ａ 上壁
２１ｂ 下壁
２１ｃ 防護柵
２２ ロックピン装着孔
２３ 円筒部
３ 刈刃
３ａ 刃縁
３ｂ 刃縁
３ｃ 刃縁
３ｄ 刃縁
３１ 取付部
３２ 刃部
３３ 貫通孔
３４ スリット
４ ロックピン
４１ 溝部
４２ 頭部
４３ オーリング DESCRIPTION OF SYMBOLS 1 Mower 2 Rotating stay 21 Insert mounting part 21a Upper wall 21b Lower wall 21c Guard fence 22 Lock pin mounting hole 23 Cylindrical part 3 Cutting blade 3a Blade edge 3b Blade edge 3c Blade edge 3d Blade edge 31 Attachment part 32 Blade part 33 Through hole 34 Slit 4 Lock pin 41 Groove 42 Head 43 O-ring

Claims (8)

草刈機の原動機により回転駆動する回転ステイの先端に刈刃を着脱可能に取り付ける刈刃取付構造であって、
前記回転ステイは、その先端に刈刃の取付部を回転ステイの長手方向に沿って摺動自在に差し込むための差込装着部を有し、
前記回転ステイには、差込装着部の上下壁を貫通してロックピンを差し込むロックピン装着孔を有し、
前記刈刃は平板状をなし、前記取付部には、前記ロックピンを差し込むための貫通孔を有し、該貫通孔から差込方向に沿って貫通孔の口径より幅狭のスリットが形成され、
前記ロックピンには、前記スリット内に差込係合可能な溝部を備えていることを特徴とする草刈機の刈刃取付構造。 A cutting blade mounting structure in which a cutting blade is detachably attached to the tip of a rotary stay that is rotationally driven by a prime mover of a mower,
The rotary stay has an insertion mounting portion for inserting a mounting portion of the cutting blade at the tip thereof in a slidable manner along the longitudinal direction of the rotary stay,
The rotary stay has a lock pin mounting hole for inserting a lock pin through the upper and lower walls of the insertion mounting portion,
The cutting blade has a flat plate shape, and the attachment portion has a through-hole for inserting the lock pin, and a slit narrower than the diameter of the through-hole is formed along the insertion direction from the through-hole. ,
A cutting blade mounting structure for a mower, wherein the lock pin is provided with a groove portion that can be inserted and engaged in the slit. 請求項１に記載の草刈機の刈刃取付構造において、
前記ロックピンにはロックピンの溝部が刈刃の取付部と一致した状態で回転ステイにおける差込装着部の外面に当接係止する頭部を有することを特徴とする草刈機の刈刃取付構造。 In the mowing blade mounting structure of the mower according to claim 1,
A cutting blade mounting of a grass cutter, wherein the locking pin has a head that abuts and locks against the outer surface of the insertion mounting portion of the rotary stay in a state where the groove portion of the locking pin coincides with the mounting portion of the cutting blade. Construction. 請求項１または２に記載の草刈機の刈刃取付構造において、
前記刈刃は、刃部の両側縁部に刈刃の表裏を差し替えて使用可能な刃縁を有することを特徴とする草刈機の刈刃取付構造。 In the mowing blade mounting structure of the mower according to claim 1 or 2,
The cutting blade mounting structure for a mowing machine, wherein the cutting blade has a blade edge that can be used by replacing the front and back of the cutting blade at both side edge portions of the blade portion. 請求項１又は２に記載の草刈機の刈刃取付構造において、
前記刈刃は、取付部の両端に刈刃の前後を差し替えて使用可能な刃縁を有する刃部を備え、前記スリットが前記貫通孔を中心としてそれぞれ両刃部方向ヘ向けて形成されていることを特徴とする草刈機の刈刃取付構造。 In the cutting blade mounting structure of the mower according to claim 1 or 2,
The said cutting blade is provided with the blade part which has the blade edge which can be used by replacing the front and back of the cutting blade in the both ends of an attachment part, and the said slit is formed toward the both blade part direction centering on the said through-hole, respectively. The mowing blade mounting structure of a mower characterized by this. 請求項４記載の草刈機の刈刃取付構造において、
前記刈刃は、両刃部の両側縁部に刈刃の表裏を差し替えて使用可能な刃縁を有することを特徴とする草刈機の刈刃取付構造。 In the mowing blade mounting structure of the mower according to claim 4,
The cutting blade mounting structure for a mowing machine, wherein the cutting blade has a blade edge that can be used by replacing the front and back of the cutting blade on both side edge portions of both blade portions. 草刈機の原動機により回転駆動する回転ステイの先端に交換可能に取り付けて使用される刈刃であって、
前記刈刃における刃部の両側縁部に刈刃の表裏を差し替えて使用可能な刃縁を有することを特徴とする刈刃。 A cutting blade that is used by being exchangeably attached to the tip of a rotary stay that is rotationally driven by a prime mover of a mower,
A cutting blade comprising a blade edge that can be used by replacing the front and back of the cutting blade at both side edges of the blade portion of the cutting blade. 草刈機の原動機により回転駆動する回転ステイの先端に交換可能に取り付けて使用される刈刃であって、
前記刈刃における回転ステイへの取付部を中心としてその両端には刃縁を有する刃部を備えることを特徴とする刈刃。 A cutting blade that is used by being exchangeably attached to the tip of a rotary stay that is rotationally driven by a prime mover of a mower,
A cutting blade comprising blade portions having blade edges at both ends thereof centering on a portion of the cutting blade attached to the rotary stay. 請求項７記載の刈刃において、
前記両刃部の両側縁部に刈刃の表裏を差し替えて使用可能な刃縁を有することを特徴とする刈刃。 The cutting blade according to claim 7,
A cutting blade having blade edges that can be used by replacing the front and back of the cutting blades on both side edge portions of the both blade portions.
JP2012288081A 2012-12-28 2012-12-28 Grass mower blade-attaching structure, and mowing blade Pending JP2014128230A (en)

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CN113661824A (en) * 2020-05-15 2021-11-19 苏州金莱克精密机械有限公司 Make things convenient for quick replacement function head cut and irritate machine of beating grass
CN114223379A (en) * 2021-12-15 2022-03-25 格力博(江苏)股份有限公司 Linkage and lawn mower
CN114223379B (en) * 2021-12-15 2023-01-31 格力博(江苏)股份有限公司 Linkage and lawn mower

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