JPH0644322Y2

JPH0644322Y2 - Tillage nail

Info

Publication number: JPH0644322Y2
Application number: JP5654689U
Authority: JP
Inventors: 康行平松; 星三五藤
Original assignee: 太陽鍛工株式会社
Priority date: 1989-05-18
Filing date: 1989-05-18
Publication date: 1994-11-16
Anticipated expiration: 2004-05-18
Also published as: JPH02148204U

Description

【考案の詳細な説明】〔考案の目的〕（産業上の利用分野）この考案は、土壌を耕起する耕耘爪に係り、特に耐久性
を向上することができる耕耘爪に関する。[Detailed Description of the Invention] [Object of the Invention] (Field of Industrial Application) The present invention relates to a plowing nail for plowing soil, and particularly to a plowing nail capable of improving durability.

（従来の技術）従来の耕耘爪としては、例えば第９図および第10図に示
すようなものがある。(Prior Art) Conventional plowing claws include, for example, those shown in FIGS. 9 and 10.

この耕耘爪101は、トラクタ、耕耘機等における耕耘軸
（図示せず）の爪ホルダ（図示せず）に取付けるための
取付部103と、土壌を切起すための刀体部105とが一体的
に形成されている。This tillage claw 101 has an attachment part 103 for attaching to a claw holder (not shown) of a tillage shaft (not shown) in a tractor, a tiller, etc., and a sword body part 105 for cutting and raising soil. Is formed in.

前記刀体部105は、耕耘爪101の回転方向に対して後退角
を有するように弯曲形成された縦刃部107と、この縦刃
部107の先端部を側方（第10図中紙面と交差する方向）
に曲成された横刃部109とから形成されている。そし
て、横刃部109の内周面109aおよびこの内周面109aにつ
ながる縦刃部107の側面の一辺を片刃111aを形成した刃
縁111とし、反対の辺を背縁113としている。The sword body portion 105 is a vertical blade portion 107 that is curved so as to have a receding angle with respect to the rotation direction of the tillage claw 101, and the tip end portion of this vertical blade portion 107 is lateral (see the paper surface in FIG. 10). Crossing direction)
It is formed of a lateral blade portion 109 that is bent. One side of the inner peripheral surface 109a of the horizontal blade portion 109 and the side surface of the vertical blade portion 107 connected to the inner peripheral surface 109a is a blade edge 111 having a single blade 111a, and the opposite side is a back edge 113.

（考案が解決しようとする課題）ところで、耕耘爪101の刀体部105は、耕耘作業に伴って
土壌との接触を繰り返すことによって摩耗するが、この
摩耗は刀体部105全体が均一に摩耗するものではなく、
第11（ａ）乃至（ｄ）に示すように、縦刃部107と横刃
部109との屈曲部115が偏摩耗し、この屈曲部115から摩
耗が進展する。このため、耕耘爪101の寿命が短かくな
り交換回数が増えるとともに、交換時間が遅れると先端
部が欠落してしまう恐れがあった。(Problems to be solved by the invention) By the way, the sword body portion 105 of the plowing claw 101 is worn by repeated contact with the soil during the plowing work. Not something to do,
As shown in the eleventh (a) to (d), the bent portion 115 of the vertical blade portion 107 and the horizontal blade portion 109 is unevenly worn, and the wear progresses from the bent portion 115. For this reason, the life of the tilling claw 101 is shortened, the number of times of replacement is increased, and there is a possibility that the tip portion may be lost if the replacement time is delayed.

これに対し、刃部に高硬度金属を溶着したり、また、溶
射したりして耐久性を向上させるようにしたものがある
が、これは極めて高価になるという経済的な問題があっ
た。On the other hand, there is a blade in which a high-hardness metal is welded or sprayed to improve durability, but this has an economical problem of being extremely expensive.

そこでこの考案は、縦刃部と横刃部の屈曲部の偏摩耗を
防止することができ、もって、耐久性を向上することが
できる耕耘爪の提供を目的とする。Then, this invention aims at providing the tillage nail which can prevent uneven wear of the bending part of a vertical blade part and a horizontal blade part, and can improve durability accordingly.

[Constitution of device]

（課題を解決するための手段）上記目的を達成するためにこの考案は、取付部と切込刀
体とを有し、切込刀体が切込側に刃部を、反対側に背部
を有する板状の本体部に形成されると共に前記刃部が回
転方向に対して後退するように湾曲形成された縦刃部
と、この縦刃部の先端部を側方に曲成した横刃部とを有
するようになっている耕耘爪であって、前記切込刀体本
体部の刃部側の厚さを背部側の厚さに対して厚肉にして
前記縦刃部の始端後方の適宜の部分から先端部まで前後
に亘って段部を形成し、この段部の肉厚を縦刃部と横刃
部の屈曲部を厚く、その前後部を漸次減少するように形
成したものである。(Means for Solving the Problems) In order to achieve the above object, the present invention has a mounting portion and a cutting knife body, and the cutting knife body has a blade portion on the cutting side and a back portion on the opposite side. A vertical blade portion formed in a plate-shaped main body having the blade portion and curved so that the blade portion retracts with respect to the rotation direction, and a horizontal blade portion in which a tip portion of the vertical blade portion is bent laterally. A plowing claw configured to have, wherein the thickness of the cutting blade main body on the blade portion side is thicker than the thickness on the back portion side, and the rear end of the vertical blade portion is appropriately rearward. A step portion is formed from the portion to the front end portion in the front and back, and the wall thickness of this step portion is formed such that the bent portions of the vertical blade portion and the horizontal blade portion are thickened and the front and rear portions thereof are gradually reduced. .

（作用）上記のように形成することにより、縦刃部と横刃部の屈
曲部における偏摩耗が防止され、切込刀体全体が略均一
に摩耗することとなり、耐久性を向上することができ
る。(Operation) By forming as described above, uneven wear at the bent portions of the vertical blade portion and the horizontal blade portion is prevented, the entire cutting blade body is worn substantially uniformly, and durability is improved. it can.

（実施例）以下、この考案の実施例を図面に基づいて説明する。(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

第１図および第２図はこの考案の一実施例に係る耕耘爪
の平面図および側面図を示すものである。1 and 2 are a plan view and a side view of a tilling claw according to an embodiment of the present invention.

耕耘爪１は、従来と同様にトラクタ、耕耘機等における
耕耘軸（図示せず）の爪ホルダ（図示せず）に取付ける
ための取付部３と、土壌を切起すための切込刀体５とが
一体的に形成されている。The tilling claw 1 has a mounting portion 3 for mounting on a claw holder (not shown) of a tilling shaft (not shown) in a tractor, a cultivator, and the like, and a cutting blade body 5 for cutting and raising soil as in the conventional case. And are integrally formed.

前記切込刀体５は、切込側に耕耘爪１の回転方向に対し
て後退角を有するように湾曲形成された縦刃部７と、こ
の縦刃部７の先端部を側方（第１図中紙面と交差する方
向）に曲成された横刃部９とを有している。そして、切
込刀体５は、横刃部９の内周面9aおよびこの内周面9aに
つながる縦刃部７の側面の一辺を片刃11aを形成した刃
部11とし、反対の辺を背部13とする板状の本体部に形成
されている。The cutting blade body 5 has a vertical blade portion 7 that is curvedly formed on the cutting side so as to have a receding angle with respect to the rotation direction of the tillage claw 1, and a tip portion of the vertical blade portion 7 laterally (first 1 has a lateral blade portion 9 bent in a direction crossing the plane of the drawing. Then, the cutting blade body 5 has the inner peripheral surface 9a of the horizontal blade portion 9 and one side surface of the vertical blade portion 7 connected to the inner peripheral surface 9a as a blade portion 11 having a single blade 11a, and the opposite side to the back portion. It is formed on the plate-shaped main body portion to be 13.

前記切込刀体５の刃部11は、第３図、第４図、第５図、
第６図および第７図に示すように、背部13に対し厚肉に
して段部15が縦刃部７の始端7aの後方の適宜の部分15a
から先端部９の部分15bまで前後に亘って形成されてい
る。The blade portion 11 of the cutting blade body 5 is shown in FIG. 3, FIG. 4, FIG.
As shown in FIGS. 6 and 7, the back portion 13 is thickened so that the step portion 15 has an appropriate portion 15a behind the starting end 7a of the vertical blade portion 7.
To the portion 15b of the tip portion 9 are formed in the front-rear direction.

これらの段部15の肉厚t₁,t₂,t₃,t₄,t₅は第８図に示すよ
うに第５図に示す縦刃部７と横刃部９の屈曲部17の肉厚
t₃を厚肉に形成し、その前後部の段部15の肉厚t₁,t₂,t₄
およびt₅を漸次減少するように形成されている。すなわ
ち、段部15の肉厚t₁,t₂,t₃,t₄およびt₅は、t₁＜t₂＜t₃
＞t₄＞t₅となるように形成されている。The wall thicknesses t ₁ , t ₂ , t ₃ , t ₄ , t ₅ of these step portions 15 are the thicknesses of the bent portions 17 of the vertical blade portion 7 and the horizontal blade portion 9 shown in FIG. 5 as shown in FIG. Thickness
The thickness t ₃ is formed to be thick, and the thickness t ₁ , t ₂ , t ₄ of the step 15 at the front and rear thereof is formed.
And t ₅ are gradually reduced. That is, the wall thicknesses t ₁ , t ₂ , t ₃ , t ₄ and t ₅ of the stepped portion 15 are t ₁ <t ₂ <t ₃
It is formed so that> t ₄ > t ₅ .

また、各段部15の高さl₁,l₂,l₃,l₄およびl₅は、第５図
に示す縦刃部７と横刃部９の屈曲部17の高さl₃に対し、
その前後部の高さl₁,l₂,l₄およびl₅を漸次減少するよう
に形成されている。すなわち、段部15の高さl₁,l₂,l₃,l
₄およびl₅は、l₁＜l₂＜l₃＞l₄＞l₅となるように形成さ
れている。The height _{_{_{l 1, l 2, l 3}}} , l 4 and l ₅ in each stepped portion 15, with respect to the height l ₃ of the bent portion 17 of the Tateha portion 7 and Yokoha unit 9 shown in FIG. 5 ,
The front and rear heights l ₁ , l ₂ , l ₄ and l ₅ are formed so as to gradually decrease. That is, the height l ₁ , l ₂ , l ₃ , l of the step 15
₄ and l ₅ are formed such that l ₁ <l ₂ <l ₃ > l ₄ > l ₅ .

したがって、上記構成に係る耕耘爪１は、縦刃部７と横
刃部９の屈曲部17の偏摩耗が防止され、切込刃体５全体
が略均一に摩耗することとなり耐久性が向上する。Therefore, in the tillage claw 1 according to the above configuration, uneven wear of the bent portions 17 of the vertical blade portion 7 and the horizontal blade portion 9 is prevented, and the entire cutting blade body 5 is worn substantially uniformly, so that the durability is improved. .

また、土壌耕起の際に背部13側が土壌に接触しないた
め、耕耘抵抗を減少することができる。Further, since the back portion 13 side does not contact the soil during soil tillage, the tilling resistance can be reduced.

なお、この考案は上記の実施例に限定されるものではな
く、例えば段部を切込刀体の両側に形成することもでき
る。The present invention is not limited to the above-described embodiment, and steps may be formed on both sides of the cutting knife body, for example.

[Effect of device]

以上の説明より明らかなように、この考案の構成によれ
ば、切込刀体の縦刃部と横刃部の屈曲部における偏摩耗
を防止することができる。As is clear from the above description, according to the configuration of the present invention, it is possible to prevent uneven wear in the bent portions of the vertical blade portion and the horizontal blade portion of the cutting knife body.

従って、耕耘爪の耐久性が向上され、交換回数を少くす
ることができる。Therefore, the durability of the tilling nail is improved and the number of times of replacement can be reduced.

[Brief description of drawings]

第１図および第２図はこの考案の一実施例に係る耕耘爪
の平面図および側面図、第３図は第１図のIII-III線矢
視断面図、第４図は第１図のIV-IV線矢視断面図、第５
図は第１図のＶ−Ｖ線矢視断面図、第６図は第１図のVI
-VI線矢視断面図、第７図は第１図のVII-VII線矢視断面
図、第８図は第１図のVIII-VIII線矢視断面図、第９図
および第10図は従来例による耕耘爪の平面図および側面
図、第11図（ａ）〜（ｄ）は従来例による耕耘爪の摩耗
形態を示す説明図である。１……耕耘爪５……切込刀体７……縦刃部９……横刃部 11……刃部 13……背部 15……段部 17……屈曲部1 and 2 are a plan view and a side view of a tilling claw according to an embodiment of the present invention, FIG. 3 is a sectional view taken along the line III-III of FIG. 1, and FIG. 4 is a view of FIG. IV-IV line arrow sectional view, the fifth
The figure is a cross-sectional view taken along the line V-V of FIG. 1, and FIG. 6 is the VI of FIG.
-VI line sectional view, FIG. 7 is a sectional view taken along the line VII-VII of FIG. 1, FIG. 8 is a sectional view taken along the line VIII-VIII of FIG. 1, and FIG. 9 and FIG. A plan view and a side view of a tilling claw according to a conventional example, and FIGS. 11A to 11D are explanatory views showing a worn form of the tilling claw according to the conventional example. 1 …… Plowing claw 5 …… Incision blade 7 …… Vertical blade 9 …… Horizontal blade 11 …… Blade 13 …… Back 15 …… Step 17 …… Bent

Claims

[Scope of utility model registration request]

1. A plate-shaped main body having a mounting portion and a cutting knife body, the cutting knife body having a blade portion on the cutting side and a back portion on the opposite side, and the blade portion. A tilling claw having a vertical blade portion curved so as to recede with respect to a rotation direction, and a horizontal blade portion in which a tip portion of the vertical blade portion is bent laterally, The thickness of the cutting blade main body on the blade side is made thicker than the thickness on the back side to form a step portion from an appropriate portion behind the starting end of the vertical blade portion to the front end in the front and back. The plowing nail is characterized in that the wall thickness of the step portion is formed such that the bent portions of the vertical blade portion and the horizontal blade portion are thick and the front and rear portions thereof are gradually reduced.