JP2534338Y2 - Knife head structure in cutting blade mechanism - Google Patents
Knife head structure in cutting blade mechanismInfo
- Publication number
- JP2534338Y2 JP2534338Y2 JP3565390U JP3565390U JP2534338Y2 JP 2534338 Y2 JP2534338 Y2 JP 2534338Y2 JP 3565390 U JP3565390 U JP 3565390U JP 3565390 U JP3565390 U JP 3565390U JP 2534338 Y2 JP2534338 Y2 JP 2534338Y2
- Authority
- JP
- Japan
- Prior art keywords
- blade
- movable blade
- cutting blade
- knife head
- receiving
- 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
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Description
【考案の詳細な説明】 〈産業上の利用分野〉 この考案は、刈刃機構におけるナイフヘッド構造に関
するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> This invention relates to a knife head structure in a cutting blade mechanism.
〈従来の技術〉 一般に、固定された受刃に対して、可動刃を重ねて復
動せしめ、稲等の稈状作物の刈り取りを行う機構におい
ては、可動刃を左右スライド自在にガイドするために、
可動刃を構成するナイフバーに後方から摺接する摩擦板
等からなるガイド構造が設けられている。そして、その
可動刃のガイド構造によって、可動刃に加わる前後上下
方向の負荷も負担していた。<Conventional technology> In general, in a mechanism in which a movable blade is overlapped with a fixed receiving blade and moved backward to cut a culm-shaped crop such as rice, the movable blade is slidably guided left and right. ,
A guide structure including a friction plate or the like that slides from behind on a knife bar that constitutes the movable blade is provided. The guide structure of the movable blade also bears a load on the movable blade in the front-rear and up-down directions.
〈考案が解決しようとする課題〉 しかし、従来のように、摩擦板等のガイド構造のみに
よって可動刃を保持する構造では、以下のような問題が
あった。<Problem to be Solved by the Invention> However, in the conventional structure in which the movable blade is held only by the guide structure such as the friction plate, there are the following problems.
つまり、可動刃には復動駆動機構を接続するためのナ
イフヘッドが取り付けられており、ナイフヘッドの重さ
によって可動刃は先端を上方へ持ち上げる方向に力が加
わる。このため、ナイフヘッド取付部分近傍のガイド構
造が特に摩滅し易く、可動刃と受刃の間に隙間が生じや
すいといった問題があった。In other words, a knife head for connecting the return drive mechanism is attached to the movable blade, and the weight of the knife head exerts a force on the movable blade in a direction to lift the tip upward. For this reason, there has been a problem that the guide structure in the vicinity of the knife head mounting portion is particularly easily worn, and a gap is easily generated between the movable blade and the receiving blade.
そして、従来、これらの摩擦板の摩耗等によって、切
れ味が悪くなり、刈刃の寿命が短くなるなどのるなどの
欠点が指摘されていた。Conventionally, it has been pointed out that the wear of the friction plates deteriorates the sharpness and shortens the life of the cutting blade.
本考案の構造は、可動刃をガイドする構造とは別個
に、ナイフヘッドの下側にナイフヘッドを支える構造を
設け、上記課題を解決することを目的とするものであ
る。The structure of the present invention aims at solving the above-mentioned problem by providing a structure for supporting the knife head below the knife head, separately from the structure for guiding the movable blade.
〈課題を解決するための手段〉 上記のような課題を解決するための本考案は、刈刃13
をナイフバー15に固定して構成した可動刃11と、可動刃
11の下部において受刃台３に対して固定されている受刃
７とからなり、所定間隔で設けられた押さえ部材19,29
を可動刃11の上側に摺接せしめ、ナイフバー15の前後端
面を受刃７の後端と、押さえ部材19,29の下部において
上記受刃台３上に取り付けられる摩擦部材の前端とによ
って摺接ガイドせしめ、該摩擦部材の上面を刈刃13の後
端下面に摺接せしめて可動刃11の左右復動をガイドする
刈刃機構において、ナイフヘッド23の下側面には、ナイ
フヘッド23の下方位置にある固定面43に対して対向する
対向面41を形成し、該対向面41を固定面43に摺接し得る
位置に設けたことを特徴としている。<Means for Solving the Problems> The present invention for solving the above-mentioned problems includes a cutting blade 13
Blade 11 fixed to knife bar 15 and movable blade
The receiving blades 7 are fixed to the receiving blade base 3 at the lower part of the holding blade 11, and the pressing members 19, 29 provided at predetermined intervals are provided.
Is slid in contact with the upper side of the movable blade 11, and the front and rear end surfaces of the knife bar 15 are slid in contact with the rear end of the receiving blade 7 and the front end of a friction member attached to the receiving blade base 3 below the holding members 19 and 29. In a cutting blade mechanism that guides and slides the upper surface of the friction member against the lower surface of the rear end of the cutting blade 13 to guide the movable blade 11 back and forth, the lower surface of the knife head 23 A feature is that an opposing surface 41 facing the fixed surface 43 at the position is formed, and the opposing surface 41 is provided at a position where the opposing surface 41 can slidably contact the fixing surface 43.
〈作用〉 可動刃11の復動によって、受刃７とともに穀稈が切断
される。可動刃11のナイフバー15は、押さえ部材19,29
と受刃７との間にはさまれて、上下動が規制され、ナイ
フバー15が受刃７の後端と摩擦部材とにはさまれて、前
後動が規制されており、左右方向のみスライド自在に支
持されている。<Operation> By the reciprocation of the movable blade 11, the grain stalk is cut together with the receiving blade 7. Knife bar 15 of movable blade 11 is provided with holding members 19 and 29
The knife bar 15 is sandwiched between the rear end of the receiving blade 7 and the friction member, and the longitudinal movement is regulated. It is freely supported.
摩擦部材は、前端の上面で可動刃11の刈刃13後端部下
面に摺接することによっても、可動刃11をガイドしてい
る。The friction member also guides the movable blade 11 by slidingly contacting the lower surface of the rear end of the cutting blade 13 of the movable blade 11 on the upper surface of the front end.
ここで、ナイフバー15と摩擦部材との間で最も接触圧
が高くなるのは、ナイフヘッド23の取付部分であり、摩
擦部材等の摩耗がナイフヘッド23の取付部分付近で生じ
易い。しかし、ナイフヘッド23の下側には、固定されて
いる受刃７側の固定面43に対して摺接し得る対向面41が
設けらているため、摩擦部材等が摩耗しても、対向面41
と固定面43の摺接によってナイフヘッド23の重さが支持
され、可動刃11と受刃７は常に密着して、良好な切れ味
が持続される。Here, the highest contact pressure between the knife bar 15 and the friction member is at the attachment portion of the knife head 23, and wear of the friction member and the like is likely to occur near the attachment portion of the knife head 23. However, the lower surface of the knife head 23 is provided with an opposing surface 41 that can slide against the fixed surface 43 on the receiving blade 7 side. 41
The weight of the knife head 23 is supported by the sliding contact between the movable blade 11 and the fixed surface 43, so that the movable blade 11 and the receiving blade 7 are always in close contact with each other, and good sharpness is maintained.
〈実施例〉 以下本考案の一実施例について図面に基づき詳説す
る。第１図は刈刃機構１の全体平面図である。刈取作業
部の前処理部下方位置には、受刃台３が前方斜め下方へ
向けて支持固定されており、受刃台３の前端辺には山型
に形成された受刃取付部５が設けられている。第３図に
示すように、受刃取付部５上には受刃７が固定ピン9に
よってそれぞれ固定されており、受刃台３の全長にわた
って設けられている。<Embodiment> An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an overall plan view of the cutting blade mechanism 1. At the lower position of the pre-processing section of the mowing work section, a receiving blade base 3 is supported and fixed obliquely downward and forward, and at the front end side of the receiving blade base 3, a receiving blade mounting portion 5 formed in a mountain shape is provided. Is provided. As shown in FIG. 3, receiving blades 7 are fixed on the receiving blade mounting portion 5 by fixing pins 9 , respectively, and are provided over the entire length of the receiving blade base 3.
受刃台３に固定されている受刃７上には可動刃11が重
ねられている。可動刃11は、三角形状の刃を有する複数
の刈刃13と、刈刃13を一列に固定したナイフバー15とに
より構成されている。A movable blade 11 is superimposed on a receiving blade 7 fixed to the receiving blade base 3. The movable blade 11 includes a plurality of cutting blades 13 having triangular blades, and a knife bar 15 having the cutting blades 13 fixed in a line.
刈刃13はナイフバー15の上側に固定ピン17によって固
定されており、受刃７上に重ねられた状態では、ナイフ
バー15の前端面は受刃７の後端面と接触して、可動刃11
の前方移動が規制される。The cutting blade 13 is fixed to the upper side of the knife bar 15 by a fixing pin 17. When the cutting blade 13 is overlaid on the receiving blade 7, the front end surface of the knife bar 15 contacts the rear end surface of the receiving blade 7 and the movable blade 11
Is restricted from moving forward.
そして、第４図及び第５図に示すように、可動刃11は
所定間隔で設けられた押さえ部材19によって、左右スラ
イド自在に押接支持されている。押さえ部材19は側面視
でＵ字状に形成されており、下部は前端面19cがナイフ
バー15の後端面に接触する摩擦ガイド部19aを構成し、
固定ボルト21によって受刃台３に固定されている。押さ
え部材19と受刃台３の間には調節板20が介挿され、摩擦
ガイド部19aの前端部上面が、可動刃11を構成する刈刃1
3の後端下面と接触するように構成されている。As shown in FIGS. 4 and 5, the movable blade 11 is supported by a pressing member 19 provided at a predetermined interval so as to be slidable left and right. The holding member 19 is formed in a U-shape in a side view, and the lower portion constitutes a friction guide portion 19a in which the front end surface 19c contacts the rear end surface of the knife bar 15,
It is fixed to the receiving table 3 by fixing bolts 21. An adjusting plate 20 is interposed between the holding member 19 and the receiving blade base 3, and the upper surface of the front end portion of the friction guide portion 19 a is the cutting blade 1 constituting the movable blade 11.
3 is configured to contact the lower surface of the rear end.
押さえ部材19の上部前端は下側に湾曲して、可動刃11
の上面に摺接する上面ガイド部19bを形成している。上
面ガイド部19bは、可動刃11に上側から接触して、可動
刃11の上下動を規制する。The upper front end of the holding member 19 is curved downward, and the movable blade 11
The upper surface guide portion 19b that slides on the upper surface of the upper surface is formed. The upper surface guide portion 19b contacts the movable blade 11 from above and regulates the vertical movement of the movable blade 11.
そして、受刃台３と押さえ部材19を同じに貫通する固
定ボルト22を締め付けることによって、上面ガイド部19
bの可動刃11に対する接触圧が調節される。Then, by tightening the fixing bolt 22 penetrating the receiving blade base 3 and the holding member 19 in the same manner, the upper surface guide portion 19
The contact pressure of b against the movable blade 11 is adjusted.
可動刃11の右端には、ナイフヘッド23が取付られてい
る。ナイフヘッド23には可動刃11の復動駆動機構が接続
される。ナイフヘッド23は、第２図に示すように、側面
視でく字に屈曲しており、前側の取付部25は可動刃11に
対して、刈刃13とナイフバー15を同じに貫通するピン24
によって固定されている。ナイフヘッド23の後側は上方
へ延びて、凹部26を形成した接続部27となってる。At the right end of the movable blade 11, a knife head 23 is attached. The knife head 23 is connected to a return drive mechanism for the movable blade 11. As shown in FIG. 2, the knife head 23 is bent in a rectangular shape when viewed from the side, and the front mounting portion 25 is provided with a pin 24 that penetrates the cutting blade 13 and the knife bar 15 in the same manner with respect to the movable blade 11.
Has been fixed by. The rear side of the knife head 23 extends upward to form a connection portion 27 having a recess 26 formed therein.
ナイフヘッド23の取付部分において、可動刃11の左右
復動をガイドする構造は、ナイフヘッド23の左右側に設
けられた押さえ部材29等による。以下、これらのガイド
構造について説明する。In the mounting portion of the knife head 23, the structure for guiding the left and right reciprocation of the movable blade 11 is provided by a pressing member 29 provided on the left and right sides of the knife head 23 and the like. Hereinafter, these guide structures will be described.
第６図及び第７図に示すように、押さえ部材29は、押
さえ部材19と略同様の形状で、摩擦ガイド部29a,上面ガ
イド部29b及び前端面29cとを有し、摩擦ガイド部29aは
固定ボルト31によって固定されている。摩擦ガイド部29
aの前端面29cは取付部25の後端面に摺接し、上面ガイド
部29bは取付部25の上面に摺接して、可動刃11の上下動
を規制しており、押さえ部材19と同様に、固定ボルト33
によって、上面ガイド部29bの接触圧が調節される。As shown in FIG. 6 and FIG. 7, the pressing member 29 has substantially the same shape as the pressing member 19, and has a friction guide portion 29a, an upper surface guide portion 29b, and a front end surface 29c. It is fixed by a fixing bolt 31. Friction guide part 29
The front end surface 29c of a is in sliding contact with the rear end surface of the mounting portion 25, and the upper surface guide portion 29b is in sliding contact with the upper surface of the mounting portion 25, and regulates the vertical movement of the movable blade 11, like the holding member 19, Fixing bolt 33
Thereby, the contact pressure of the upper surface guide portion 29b is adjusted.
一方、摩擦ガイド部29aと受刃台３の間には、調節板3
5と摩擦板37が介挿されている。下側の摩擦板37は、２
つの押さえ部材29の間にわたって設けられて通直な単一
部材より構成され、前端面37aは摩擦板37の全長にわた
って、ナイフバー15の後端面に摺接し、摩擦板37の前端
面37aの上面は、可動刃11の刈刃13後端下面と摺接して
いる。On the other hand, an adjusting plate 3 is provided between the friction guide portion 29a and the blade rest 3.
5 and the friction plate 37 are interposed. The lower friction plate 37 is 2
The front end face 37a is in contact with the rear end face of the knife bar 15 over the entire length of the friction plate 37, and the upper surface of the front end face 37a of the friction plate 37 is The sliding edge of the movable blade 11 is in sliding contact with the lower surface of the rear end of the cutting blade 13.
従って、摩擦板37は、前端面37aと、上面前端で可動
刃11をガイドすることとなる。摩擦板37は上記のよう
に、ナイフヘッド23の自重などによって最も接触圧が高
くなるナイフヘッド取付部分の略全域にわたってナイフ
バー15及び刈刃13と摺接するように取り付けられている
ため、摩擦板37とナイフバー15及び刈刃13との単位面積
当たりの接触圧が小さくなり、摩擦板37の摩滅の度合も
少なくなるといった効果がある。Therefore, the friction plate 37 guides the movable blade 11 at the front end face 37a and the front end of the upper surface. As described above, the friction plate 37 is attached so as to be in sliding contact with the knife bar 15 and the cutting blade 13 over substantially the entire region of the knife head attachment portion where the contact pressure becomes highest due to the weight of the knife head 23 and the like. The contact pressure per unit area with the knife bar 15 and the cutting blade 13 per unit area is reduced, and the degree of wear of the friction plate 37 is reduced.
ナイフヘッド23の接続部27の下側には、肉厚部39が形
成され、最も摩擦板37に接近する肉厚部39の下面前端部
には、平滑な対向面41が形成されている。対向面41は、
摩擦板37の上面にあたる固定面43と接触し得るように形
成されている。摩擦板37が摩滅した時には、可動刃11の
刈刃13先端側が受刃７先端から離れないように、対向面
41が固定面43と摺接して、可動刃11をガイドする構造で
ある。A thick portion 39 is formed below the connecting portion 27 of the knife head 23, and a smooth opposing surface 41 is formed at the front end of the lower surface of the thick portion 39 closest to the friction plate 37. The facing surface 41 is
The friction plate 37 is formed so as to be able to come into contact with the fixed surface 43 corresponding to the upper surface thereof. When the friction plate 37 is worn out, the movable blade 11 has a facing surface so that the leading end side of the cutting blade 13 does not separate from the tip of the receiving blade 7.
41 is a structure in which the movable blade 11 is guided by sliding contact with the fixed surface 43.
一方、受刃台３において、摺動するナイフバー15の下
側位置には所定間隔で穴45が穿設されている。穴45の後
端部は、ナイフバー15と摩擦板37の前端面37aや摩擦ガ
イド部19aの前端面19cが接触する位置の後方まで達して
いる。この様な穴45の形成によって、受刃台３の軽量化
が図られるとともに、摩擦板37とナイフバー15との間に
泥等がはさまれた場合であっても、随時穴45から泥を排
出することができ、摩擦板37の摩耗を少なくする作用が
ある。On the other hand, holes 45 are drilled at predetermined intervals at the lower side of the sliding knife bar 15 in the receiving blade base 3. The rear end of the hole 45 reaches the rear of the position where the knife bar 15 and the front end face 37a of the friction plate 37 and the front end face 19c of the friction guide portion 19a come into contact. By forming such a hole 45, the weight of the receiving blade base 3 can be reduced, and even if mud or the like is sandwiched between the friction plate 37 and the knife bar 15, mud may be removed from the hole 45 at any time. It can be discharged and has the effect of reducing wear of the friction plate 37.
〈考案の効果〉 以上の如く構成されるこの考案の構造によれば、可動
刃の駆動によって、可動刃のガイド構造が摩滅し、可動
刃の駆動にガタが生じても、ナイフヘッドの対向面が固
定面に摺接して、可動刃をガイドするため、可動刃の復
動駆動におけるガタの発生を最小限に押さえることがで
きる。<Effect of the Invention> According to the structure of the invention configured as described above, the guide structure of the movable blade is worn by the driving of the movable blade, and even if the movable blade is rattled, the opposing surface of the knife head is formed. Slides on the fixed surface and guides the movable blade, so that it is possible to minimize the occurrence of play in the backward drive of the movable blade.
特に、摩滅によるガタはナイフヘッド取付位置付近で
発生しやすく、対向面はナイフヘッドに設けられている
ので、ガタの生じた可動刃の復動ガイドを補助する特別
の構造を必要とせず、簡単な構造で可動刃のガイドを確
実なものとすることができるといった効果がある。In particular, play due to wear is likely to occur near the knife head mounting position, and the opposing surface is provided on the knife head, so there is no need for a special structure to assist the return guide of the movable blade with play, and it is easy With such a simple structure, the movable blade can be reliably guided.
第１図は刈刃機構におけるナイフヘッドの取付部分の側
面断面図、第２図は刈刃機構の全体平面図、第３図は刈
刃機構のＡ−Ａ断面図、第４図は同じくＢ−Ｂ、第５図
は同じくＣ−Ｃ、第６図は同じくＤ−Ｄ、第７図は同じ
くＥ−Ｅである。 図面の符号は次ぎの各部を示す。 1:刈刃機構、3:受刃台、7:受刃 11:可動刃、13:刈刃、15:ナイフバー 19:押さえ部材、23:ナイフヘッド、29:押さえ部材 37:摩擦板、39:肉厚部、41:対向面 43:固定面FIG. 1 is a side sectional view of a mounting portion of a knife head in a cutting blade mechanism, FIG. 2 is an overall plan view of the cutting blade mechanism, FIG. 3 is an AA cross-sectional view of the cutting blade mechanism, and FIG. -B, FIG. 5 also shows CC, FIG. 6 shows DD, and FIG. 7 shows EE. Reference numerals in the drawings indicate the following parts. 1: Cutting blade mechanism, 3: Blade holder, 7: Blade 11: Movable blade, 13: Cutting blade, 15: Knife bar 19: Holding member, 23: Knife head, 29: Holding member 37: Friction plate, 39: Thick part, 41: Opposing surface 43: Fixed surface
Claims (1)
構成した可動刃（11）と、可動刃（11）の下部において
受刃台（３）に対して固定されている受刃（７）とから
なり、所定間隔で設けられた押さえ部材（19），（29）
を可動刃（11）の上側に摺接せしめ、ナイフバー（15）
の前後端面を受刃（７）の後端と、押さえ部材（19），
（29）の下部において上記受刃台（３）上に取り付けら
れる摩擦部材の前端とによって摺接ガイドせしめ、該摩
擦部材の上面を刈刃（13）の後端下面に摺接せしめて可
動刃（11）の左右復動をガイドする刈刃機構において、
ナイフヘッド（23）の下側面には、ナイフヘッド（23）
の下方位置にある固定面（43）に対して対向する対向面
（41）を形成し、該対向面（41）を固定面（43）に摺接
し得る位置に設けた刈刃機構におけるナイフヘッド構
造。A movable blade (11) having a cutting blade (13) fixed to a knife bar (15), and a receiving part fixed to a receiving blade base (3) below the movable blade (11). Holding members (19), (29) comprising blades (7) and provided at predetermined intervals
And slide it over the movable blade (11), and then knife bar (15)
The front and rear end faces of the receiving blade (7) and the holding member (19),
The lower part of (29) is guided in sliding contact with the front end of a friction member mounted on the receiving blade base (3), and the upper surface of the friction member is brought into sliding contact with the lower surface of the rear end of the cutting blade (13) to move the movable blade. (11) In the cutting blade mechanism that guides the left and right backward movement,
On the lower side of the knife head (23), the knife head (23)
A knife head in a cutting blade mechanism, wherein an opposing surface (41) is formed to oppose a fixed surface (43) located at a lower position of the cutting blade, and the opposing surface (41) is provided at a position capable of slidingly contacting the fixed surface (43). Construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3565390U JP2534338Y2 (en) | 1990-04-02 | 1990-04-02 | Knife head structure in cutting blade mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3565390U JP2534338Y2 (en) | 1990-04-02 | 1990-04-02 | Knife head structure in cutting blade mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03126432U JPH03126432U (en) | 1991-12-19 |
| JP2534338Y2 true JP2534338Y2 (en) | 1997-04-30 |
Family
ID=31541196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3565390U Expired - Lifetime JP2534338Y2 (en) | 1990-04-02 | 1990-04-02 | Knife head structure in cutting blade mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2534338Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190085760A1 (en) * | 2017-09-19 | 2019-03-21 | Pratt & Whitney Canada Corp. | Engine assembly |
-
1990
- 1990-04-02 JP JP3565390U patent/JP2534338Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190085760A1 (en) * | 2017-09-19 | 2019-03-21 | Pratt & Whitney Canada Corp. | Engine assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03126432U (en) | 1991-12-19 |
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