JP2006230307A - Apparatus for fastening tillage tine - Google Patents

Apparatus for fastening tillage tine Download PDF

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JP2006230307A
JP2006230307A JP2005051101A JP2005051101A JP2006230307A JP 2006230307 A JP2006230307 A JP 2006230307A JP 2005051101 A JP2005051101 A JP 2005051101A JP 2005051101 A JP2005051101 A JP 2005051101A JP 2006230307 A JP2006230307 A JP 2006230307A
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bolt
claw
flange
tilling
bolts
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JP4588488B2 (en
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Katsunari Nagaya
克成 長屋
Noboru Fujiwara
昇 藤原
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Kobashi Industries Co Ltd
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Kobashi Industries Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To improve reliability for whirl-stop functions of bolts. <P>SOLUTION: An apparatus 1 for fastening tillage tines is equipped with two bolts 10 passed from a pair of communicating holes 87 and 88 provided in a base part 86 of each tillage tine 85 through a pair of each of tine mounting holes 82 and 83 installed in a flange 81, screwing to nuts 40 and securing the base part 86 of the tillage tine 85 to the flange 81 and a washer plate 30 for passing the bolts therethrough. The washer plate 30 is provided with through-holes 31 for passing bolt shaft parts 11 therethrough and bolt revolution regulating parts 33 extending along the lateral faces of hexagonal bolt head parts 13 in both lateral parts. The bolt shaft parts 11 are passed through the through-holes 31 of the washer plate 30 and the bolt head parts 13 are arranged on the inside of the bolt revolution regulating parts 33 to regulate the revolution of the bolts 10. Tips of the oppositely arranged planar parts 33a and 33d of the bolt revolution regulating parts 33 are bent to the inside to prevent falling off of the bolts 10. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、圃場を耕耘する耕耘ロータリの耕耘軸に耕耘爪を取り付けるための耕耘爪締結装置に関する。   The present invention relates to a tillage claw fastening device for attaching a tillage nail to a tillage shaft of a tillage rotary that plows a field.

従来、圃場を耕耘する耕耘ロータリの耕耘軸に耕耘爪を取り付ける構造としては、耕耘爪の基部に設けられた一対の連通孔から耕耘軸に固着されたフランジに設けられた一対の各爪取付孔にボルトを挿通してナットと螺合して耕耘爪の基部をフランジに固着する構造が知られている。   Conventionally, as a structure for attaching a cultivation claw to a cultivation shaft of a cultivation rotary that cultivates a field, a pair of claw attachment holes provided on a flange fixed to a cultivation shaft from a pair of communication holes provided on a base of the cultivation claw A structure is known in which a bolt is inserted through and screwed into a nut to fix the base of a tilling nail to a flange.

この耕耘爪取付構造によれば、フランジに耕耘爪を取り付けるには、２本のボルトのそれぞれを耕耘爪の基部に設けられた一対の連通孔に挿通するとともに、フランジに設けられた一対の爪取付孔に挿通する。そして、フランジから突出したボルトにナットを螺合してフランジを介して耕耘爪を締め付ける。このナットの螺合操作の際に、ボルトがナットと共回りしないように、ボルト頭部を押さえ付ける必要があり、耕耘爪の取り付け作業の作業性が悪かった。   According to this tillage claw attachment structure, in order to attach the tillage claw to the flange, each of the two bolts is inserted into the pair of communication holes provided in the base of the tillage claw and the pair of claws provided on the flange Insert through the mounting hole. Then, a nut is screwed onto the bolt protruding from the flange, and the tilling claw is tightened through the flange. During the screwing operation of the nut, it is necessary to press the bolt head so that the bolt does not rotate together with the nut, and the workability of attaching the tilling claw is poor.

このような不都合を改良したものが特許文献１に記載の耕耘爪取付装置である。この耕耘爪取付装置６０は、図４（ａ）（側面図）に示すように、両側部に挿通孔６２を有した座金体６１と、これらの挿通孔６２に装着された２本のボルト６５を有してなる。ボルト６５のボルト軸６６の基端側端部にはローレット目を形成したローレット軸部６６ａが設けられ、このローレット軸部６６ａは挿通孔６２の内径よりも僅かに大径である。このため、ローレット軸部６６ａは挿通孔６２に圧入されて挿着される。その結果、２本のボルト６５は、座金体６１に対して一体的に固定される。このため、図４（ｂ）（断面図）に示すように、耕耘爪８５の基部に設けられた一対の連通孔８７からフランジ８１に設けられた一対の各爪取付孔８２に対してボルト６５を挿通してナット４０を螺合して締め付けても、ボルト６５が回ることはなく、また各ボルト頭部６７を押さえる必要もなく、ナット４０をそれぞれのボルトに対して締め付けて耕耘爪８５をフランジ８１に固着することができる。   What improved such an inconvenience is a tillage nail attachment device described in Patent Document 1. As shown in FIG. 4A (side view), the tillage claw attachment device 60 includes a washer body 61 having insertion holes 62 on both sides, and two bolts 65 attached to the insertion holes 62. It has. A knurled shaft portion 66 a having a knurled shape is provided at the base end side end of the bolt shaft 66 of the bolt 65, and the knurled shaft portion 66 a is slightly larger in diameter than the inner diameter of the insertion hole 62. For this reason, the knurled shaft portion 66a is press-fitted into the insertion hole 62 and inserted. As a result, the two bolts 65 are integrally fixed to the washer body 61. For this reason, as shown in FIG. 4B (cross-sectional view), the bolt 65 extends from the pair of communication holes 87 provided in the base of the tilling claw 85 to the pair of claw attachment holes 82 provided in the flange 81. Even if the nut 40 is screwed and tightened, the bolt 65 does not rotate and there is no need to hold down each bolt head 67, and the nut 40 is tightened against each bolt to cultivate the tilling claw 85. It can be fixed to the flange 81.

特許第３２４７８３５号公報Japanese Patent No. 3247835

この特許文献１に記載の耕耘爪取付装置のボルトは、ボルト軸の基端側にローレット軸部が設けられており、専用品であって市販品をそのまま用いることができない。このため、コストが高いという問題がある。また、ボルトと座金体はローレット軸部を介して一体化されているが、ローレット軸部の外周に形成されたローレット目は座金体の挿通孔に圧入される際に、ローレット目の一部が塑性変形して破断する虞がある。従って、従来の耕耘爪取付装置は、ボルトと座金体との結合強度が弱くなる場合があり、ボルトの回り止め機能に対する信頼性が低いという問題を有する。   The bolt of the tillage claw mounting device described in Patent Document 1 is provided with a knurled shaft portion on the base end side of the bolt shaft, and is a dedicated product, and a commercially available product cannot be used as it is. For this reason, there exists a problem that cost is high. The bolt and the washer body are integrated via the knurled shaft part, but when the knurled eye formed on the outer periphery of the knurled shaft part is press-fitted into the insertion hole of the washer body, a part of the knurled eye is There is a risk of plastic deformation and fracture. Therefore, the conventional tillage claw attaching device has a problem that the coupling strength between the bolt and the washer body may be weak, and the reliability with respect to the detent function of the bolt is low.

本発明は、このような問題を鑑みてなされたものであり、コストが安価であり、ボルトの回り止め機能に対する信頼性の高い耕耘爪締結装置を提供することを目的とする。   The present invention has been made in view of such problems, and an object of the present invention is to provide a tillage claw fastening device that is low in cost and highly reliable with respect to a bolt detent function.

上記目的を達成するために本発明の耕耘爪締結装置は、耕耘軸に設けられたフランジに耕耘爪を取り付ける耕耘爪締結装置であって、耕耘爪の基部に設けられた一対の連通孔からフランジに設けられた一対の各爪取付孔に挿通されてナットと螺合して耕耘爪の基部をフランジに固着する２本のボルトと、２本のボルトを挿着する座金板とを備え、該座金板は、両側部にボルトのボルト軸部を挿通する挿通孔とボルトの六角形状のボルト頭部の側面に沿って延びるボルト回動規制部を有し、座金板の挿通孔にボルトのボルト軸部を挿通し、ボルト回動規制部の内側にボルト頭部を配置してボルトの回動を規制し、ボルト頭部の頂面を超えて延びるボルト回動規制部の先端部を内側に折り曲げてボルトのボルト軸部と反対側への移動を規制することを特徴とする。   In order to achieve the above object, a tillage claw fastening device according to the present invention is a tillage claw fastening device for attaching a tillage claw to a flange provided on a tillage shaft, and is provided with a flange from a pair of communication holes provided at the base of the tillage claw. Two bolts that are inserted into a pair of claw mounting holes provided in the screw and screwed into the nut to fix the base of the tilling claw to the flange, and a washer plate for inserting the two bolts, The washer plate has an insertion hole for inserting the bolt shaft portion of the bolt on both sides and a bolt rotation restricting portion extending along the side surface of the hexagonal bolt head of the bolt, and the bolt bolt is inserted into the insertion hole of the washer plate. Insert the shaft, place the bolt head inside the bolt rotation restricting portion to restrict the rotation of the bolt, and place the tip of the bolt rotation restricting portion extending beyond the top surface of the bolt head inside Bending to restrict the movement of the bolt to the opposite side of the bolt shaft The features.

この発明によれば、ボルトは、ボルト回動規制部によって回動が規制されるとともに、折り曲げられたボルト回動規制部の先端部によってボルト軸部と反対側への移動が規制されることにより、ナットを締め付ける際にボルト頭部を押さえ付けてボルトの軸方向への移動やボルトの回動を規制する必要がない。このため、ボルト回動規制部によるボルトの回り止め機能の信頼性を常に高い状態にすることができる。その結果、耕耘軸をフランジに固着する作業やフランジから耕耘軸を脱着する作業の作業性を向上させることができる。またボルトは市販品のものを使用することができ、座金板は板金の折り曲げ加工等によって形成されるので、耕耘爪締結装置のコストを安価にすることができる。   According to this invention, the rotation of the bolt is restricted by the bolt rotation restricting portion, and the movement of the bent bolt turning restricting portion to the opposite side to the bolt shaft portion is restricted by the bent tip end portion. When tightening the nut, there is no need to hold down the bolt head to restrict the axial movement of the bolt or the rotation of the bolt. For this reason, the reliability of the rotation prevention function of the bolt by the bolt rotation restricting portion can always be made high. As a result, the workability of the work of fixing the tilling shaft to the flange and the work of detaching the tilling shaft from the flange can be improved. Further, commercially available bolts can be used, and the washer plate is formed by bending a sheet metal or the like, so that the cost of the tilling claw fastening device can be reduced.

また本発明は、挿通孔をバーリング加工してボルト回動規制部が配設された側と反対側へ延びる筒状部を設け、挿通孔から延びるボルト軸部の基部側を囲む筒状部をかしめて、座金板に対するボルトの軸方向への移動を規制することを特徴とする。   Further, the present invention provides a cylindrical portion extending from the insertion hole to a side opposite to the side where the bolt rotation restricting portion is disposed by burring the insertion hole, and surrounding the base portion side of the bolt shaft portion extending from the insertion hole. Caulking to restrict the movement of the bolt in the axial direction relative to the washer plate.

この発明によれば、ボルト軸部は挿通孔に形成された筒状部によってかしめられることにより、ボルトが挿通孔から抜け出るのを規制する抜け止め機能をより向上させることができ、またボルトと座金板との一体性が向上して、耕耘爪締結装置のフランジへの挿着作業の作業性を向上させることができる。   According to the present invention, the bolt shaft portion is caulked by the cylindrical portion formed in the insertion hole, so that it is possible to further improve the retaining function for restricting the bolt from coming out of the insertion hole, and the bolt and the washer. The integrity with the plate is improved, and the workability of the work of inserting the tillage hook fastening device into the flange can be improved.

また本発明は、耕耘軸に設けられたフランジに耕耘爪を取り付ける耕耘爪締結装置であって、耕耘爪の基部に設けられた一対の連通孔からフランジに設けられた一対の各爪取付孔に挿通されてナットと螺合して耕耘爪の基部をフランジに固着する２本のボルトと、２本のボルトを挿通する座金板とを備え、該座金板は、両側部にボルトのボルト軸部を挿通する挿通孔とボルトの六角形状のボルト頭部の側面に沿って延びるとともに該ボルト頭部の座面側から頂面の手前側に延びるボルト回動規制部を有し、座金板の挿通孔にボルトのボルト軸部を挿通し、ボルト回動規制部の内側にボルト頭部を配置してボルトの回動を規制し、挿通孔はバーリング加工されてボルト回動規制部が配設された側と反対側へ延びる筒状部を備え、挿通孔から延びるボルト軸部の基部側を囲む筒状部をかしめて、座金板に対するボルトの軸方向への移動を規制することを特徴とする。   Further, the present invention is a tilling claw fastening device for attaching a tilling claw to a flange provided on a tilling shaft, from a pair of communication holes provided on a base of the tilling claw to a pair of each claw mounting hole provided on the flange. Two bolts that are inserted and screwed into the nut to fix the base of the tilling claw to the flange are provided, and a washer plate through which the two bolts are inserted. The washer plate has bolt bolt portions on both sides. A bolt rotation restricting portion extending along the side surface of the bolt head and the hexagonal bolt head of the bolt and extending from the seat surface side of the bolt head to the front side of the top surface, and inserting the washer plate The bolt shaft portion of the bolt is inserted into the hole, the bolt head is arranged inside the bolt rotation restricting portion to restrict the rotation of the bolt, the insertion hole is burring processed, and the bolt rotation restricting portion is provided. It has a cylindrical part that extends to the opposite side and extends from the insertion hole A cylindrical portion surrounding the base portion of the bolt shank is crimped, characterized in that it restricts the movement in the axial direction of the bolt with respect to the washer plate.

この発明によれば、ボルト回動規制部によってボルトの回動が規制され、ボルト軸部は挿通孔に形成された筒状部によってかしめられ、ボルト回動規制部がボルト頭部の座面側から頂面の手前側に延びることにより、座金板に対してボルトの回動が規制されるとともに、ボルト軸方向への移動が規制される。このため、ナットを締め付ける際にボルト頭部を押さえ付けてボルトの軸方向への移動やボルトの回動を規制する必要がない。その結果、ボルト回動規制部によるボルトの回り止め機能の信頼性を常に高い状態にすることができ、耕耘軸をフランジに固着する作業やフランジから耕耘軸を脱着する作業の作業性を向上させることができる。またボルトは市販品のものを使用することができ、座金板は板金の折り曲げ加工等によって形成されるので、耕耘爪締結装置のコストを安価にすることができる。さらにボルト回動規制部はボルト頭部の座面から頂面の手前側までしか延びていないので、ボルト頭部の頂面側の側面は露出した状態にある。このため、スパナやメガネレンチ等の工具の使用が可能であり、その結果、耕耘爪の交換作業のような耕耘軸を備えた耕耘ロータがフリーな状態の方が作業がし易い場合、スパナ等をボルト頭部に係合させることで、耕耘ロータの回動を規制して耕耘爪の着脱作業を容易に行うことができる。   According to the present invention, the rotation of the bolt is restricted by the bolt turning restricting portion, the bolt shaft portion is caulked by the cylindrical portion formed in the insertion hole, and the bolt turning restricting portion is on the seat surface side of the bolt head. , The rotation of the bolt with respect to the washer plate is restricted and the movement in the bolt axial direction is restricted. For this reason, when tightening a nut, it is not necessary to hold down a bolt head and regulate movement of the bolt in the axial direction and rotation of the bolt. As a result, the reliability of the bolt rotation prevention function by the bolt rotation restricting portion can always be made high, and the workability of the work of fixing the tilling shaft to the flange and the work of removing the tilling shaft from the flange is improved. be able to. Further, commercially available bolts can be used, and the washer plate is formed by bending a sheet metal or the like, so that the cost of the tilling claw fastening device can be reduced. Furthermore, since the bolt rotation restricting portion extends only from the seat surface of the bolt head to the front side of the top surface, the side surface on the top surface side of the bolt head is exposed. For this reason, it is possible to use tools such as a wrench or a spectacle wrench. As a result, if the cultivating rotor with a cultivating shaft is free, such as exchanging cultivating claws, it is easier to work with a wrench, etc. By engaging the bolt head with the bolt head, the rotation of the tilling rotor can be restricted and the tilling claw can be easily attached and detached.

本発明に係わる耕耘爪締結装置によれば、ボルト回動規制部によってボルトの回動を規制し、折り曲げられたボルト回動規制部の先端部によってボルト軸部と反対側への移動を規制することにより、コストが安価であって、ボルトの回り止め機能に対する信頼性の高い耕耘爪締結装置を提供することができる。   According to the tillage claw fastening device according to the present invention, the rotation of the bolt is restricted by the bolt rotation restricting portion, and the movement of the bent bolt turning restricting portion to the opposite side to the bolt shaft portion is restricted. Thus, it is possible to provide a tillage claw fastening device that is low in cost and highly reliable with respect to a bolt detent function.

以下、本発明に係る耕耘爪締結装置について、図１から図３を参照して説明する。耕耘爪締結装置１は、図１に示すように、耕耘軸８０に設けられたフランジ８１に耕耘爪８５を取り付けるためのものであり、耕耘爪８５の基部８６に設けられた一対の連通孔８７，８８からフランジ８１に設けられた一対の各爪取付孔８２，８３に挿通されてナットと螺合して耕耘爪８５の基部８６をフランジ８１に固着する２本のボルト１０と、２本のボルト１０のボルト頭部と耕耘爪８５の基部８６との間に配置されて２本のボルト１０を挿通する座金板３０とを備えてなる。   Hereinafter, a tilling claw fastening device according to the present invention will be described with reference to FIGS. 1 to 3. As shown in FIG. 1, the tilling claw fastening device 1 is for attaching a tilling claw 85 to a flange 81 provided on a tilling shaft 80, and a pair of communication holes 87 provided in a base 86 of the tilling claw 85. , 88 are inserted into a pair of claw mounting holes 82, 83 provided in the flange 81, and are screwed into the nut to fix the base 86 of the tilling claw 85 to the flange 81, and two bolts 10. The washer plate 30 is provided between the bolt head of the bolt 10 and the base 86 of the tillage claw 85 and through which the two bolts 10 are inserted.

ボルト１０は、図２（ａ）（側面図）及び（ｂ）（平面図）に示すように、市販品と同一形状であり、先端部に雄ねじ１１ａを形成したボルト軸部１１と、この基端部に繋がったボルト頭部１３とを有してなる。   As shown in FIGS. 2 (a) (side view) and (b) (plan view), the bolt 10 has the same shape as a commercially available product, and a bolt shaft portion 11 having a male screw 11a formed at the tip, and this base. It has a bolt head 13 connected to the end.

座金板３０は、板金製であり、両側部にボルト１０のボルト軸部１１を挿通する挿通孔３１を有し、且つ六角形状のボルト頭部１３の側面に沿って延びるとともにボルト頭部１３の座面１３ａ側から頂面１３ｂ側に延びるボルト回動規制部３３を有する。ボルト回動規制部３３は座金板３０の両端部に設けられ、連続的に繋がる４つの平面部３３ａ，３３，３３ｃ，３３ｄを有して構成されている。４つの各平面部３３ａ，３３，３３ｃ，３３ｄは六角形状のボルト頭部１３の側面１３ｃに面するように近接配置され、ボルト頭部１３の側面１３ｃがこれらの平面部３３ａ，３３，３３ｃ，３３ｄに当接して、ボルト１０の回動を規制する。   The washer plate 30 is made of sheet metal, has insertion holes 31 through which the bolt shaft portions 11 of the bolts 10 are inserted on both sides, extends along the side surface of the hexagonal bolt head 13, and the bolt head 13. A bolt rotation restricting portion 33 extending from the seat surface 13a side to the top surface 13b side is provided. The bolt rotation restricting portion 33 is provided at both ends of the washer plate 30 and is configured to have four plane portions 33a, 33, 33c, and 33d that are continuously connected. The four flat surface portions 33a, 33, 33c, and 33d are arranged close to each other so as to face the side surface 13c of the hexagonal bolt head portion 13, and the side surface 13c of the bolt head portion 13 is set to these flat surface portions 33a, 33, 33c, 33d is contacted and the rotation of the bolt 10 is restricted.

４つの平面部３３ａ，３３，３３ｃ，３３ｄのうち対向配置された２つの平面部３３ａ，３３ｄはボルト頭部１３の頂面１３ｂを超えて延びてその先端部は内側に折り曲げられている。このため、ボルト１０は、この内側へ折り曲げられた突出部３３ｅによってボルト１０の座面１３ａと反対側への移動が規制される。なお、挿通孔３１をバーリング加工してボルト回動規制部３３が配設された側と反対側に筒状部３２を形成し、挿通孔３１から延びるボルト軸部１１の基部側を囲む筒状部３２をかしめて、座金板３０に対するボルト１０の軸方向への移動を規制するようにして、ボルト１０の座金板３０に対する抜け止めをより確実にしてもよい。   Of the four flat portions 33a, 33, 33c, and 33d, the two flat portions 33a and 33d that face each other extend beyond the top surface 13b of the bolt head 13, and the tip portions thereof are bent inward. Therefore, the movement of the bolt 10 to the side opposite to the seat surface 13a is restricted by the protruding portion 33e bent inward. The insertion hole 31 is subjected to burring to form a cylindrical part 32 on the side opposite to the side where the bolt rotation restricting part 33 is disposed, and a cylindrical shape surrounding the base side of the bolt shaft part 11 extending from the insertion hole 31. The part 32 may be caulked to restrict the movement of the bolt 10 in the axial direction with respect to the washer plate 30, so that the bolt 10 can be more reliably prevented from coming off from the washer plate 30.

次に、この耕耘爪締結装置１を用いて前述した耕耘爪８５を耕耘軸８０のフランジ８１に固定する方法について説明する。先ず、図１に示すように、耕耘爪８５の基部８６をフランジ８１の一対の爪取付孔８２，８３に対向配置して、耕耘爪８５の基部８６に設けられた一対の連通孔８７，８８と一対の爪取付孔８２，８３とを連通させる。そして、耕耘爪締結装置１の２本のボルト１０を一対の連通孔８７，８８から一対の各爪取付孔８２，８３に挿通させる。そして、図２（ｃ）（側面図）に示すように、爪取付孔８２，８３から突出したボルト軸部１１の先端部にナット４０を螺合して、耕耘爪８５の基部８６を締め付けて耕耘爪８５をフランジ８１に固着する。   Next, a method for fixing the above-described tilling claw 85 to the flange 81 of the tilling shaft 80 using the tilling claw fastening device 1 will be described. First, as shown in FIG. 1, the base 86 of the tilling claw 85 is disposed opposite to the pair of claw mounting holes 82 and 83 of the flange 81, and a pair of communication holes 87 and 88 provided in the base 86 of the tilling claw 85. And a pair of claw attachment holes 82 and 83 are communicated. Then, the two bolts 10 of the tilling claw fastening device 1 are inserted through the pair of claw mounting holes 82 and 83 from the pair of communication holes 87 and 88. Then, as shown in FIG. 2C (side view), the nut 40 is screwed into the tip end portion of the bolt shaft portion 11 protruding from the claw mounting holes 82 and 83, and the base 86 of the tilling claw 85 is tightened. The tilling claw 85 is fixed to the flange 81.

ここで、座金板３０の両端部にはボルト１０が座金板３０に対して回動規制され且つ抜け止めされているので、２本のボルト１０は耕耘爪８５の連通孔８７，８８からフランジ８１の各爪取付孔８２，８３に同時に挿通される。また、この２本のボルト１０にナット４０をそれぞれに強く締め付けてもこの２本のボルト１０が回ることはなく、各ボルトのボルト頭部１３を押さえ付ける必要もない。   Here, since the bolts 10 are restricted from rotating with respect to the washer plate 30 at both ends of the washer plate 30 and are prevented from coming off, the two bolts 10 are connected to the flange 81 from the communication holes 87 and 88 of the tilling claw 85. Are inserted into the claw mounting holes 82 and 83 simultaneously. Further, even if the nuts 40 are strongly tightened to the two bolts 10, the two bolts 10 do not rotate and it is not necessary to press down the bolt heads 13 of the respective bolts.

このように、図１に示すように、耕耘軸８０のフランジ８１に耕耘爪８５を固着する際には、耕耘爪８５を固着するボルト１０を２本１組として同時に耕耘爪８５の基部８６とフランジ８１に装着でき、ボルト１０を１本ずつ装着する必要がない。このため、フランジ８１に対する耕耘爪８５の装着を簡単な操作で短時間に行うことができる。   Thus, as shown in FIG. 1, when the tilling claw 85 is fixed to the flange 81 of the tilling shaft 80, two bolts 10 to which the tilling claw 85 is fixed are used as one set, and the base 86 of the tilling claw 85 is simultaneously set. It can be attached to the flange 81, and it is not necessary to attach the bolts 10 one by one. For this reason, the attachment of the tillage claw 85 to the flange 81 can be performed in a short time by a simple operation.

またボルト１０は座金板３０に対して回動規制されるとともに、抜け止めされているので、回り止め機能が低下する虞はなく、回り止め機能の信頼性は高い。従って、フランジ８１に対する耕耘爪８５の装着作業を常に簡単な操作で行うことができる。   Further, since the bolt 10 is restricted from rotating with respect to the washer plate 30 and is prevented from coming off, there is no possibility that the anti-rotation function is lowered, and the reliability of the anti-rotation function is high. Therefore, the mounting operation of the tillage claw 85 to the flange 81 can always be performed with a simple operation.

また図３（ａ）（側面図）、（ｂ）（平面図）及び（ｃ）（側面図）に示すように、ボルト回動規制部３３の４つの平面部３３ａ，３３，３３ｃ，３３ｄの全てをボルト頭部１３の座面１３ａから頂面１３ｂの手前側まで延ばしてボルト１０の回動を規制し、挿通孔３１をバーリング加工してボルト回動規制部３３が配設された側と反対側に筒状部３２を形成し、挿通孔３１から延びるボルト軸部１１の基部側を囲む筒状部３２をかしめて、座金板３０に対するボルト１０の軸方向への移動を規制してもよい。   Further, as shown in FIGS. 3A (side view), (b) (plan view), and (c) (side view), the four plane portions 33a, 33, 33c, and 33d of the bolt rotation restricting portion 33 are shown. All are extended from the seat surface 13a of the bolt head 13 to the front side of the top surface 13b to restrict the rotation of the bolt 10, and the insertion hole 31 is subjected to burring so that the bolt rotation restricting portion 33 is disposed. Even if the cylindrical part 32 is formed on the opposite side and the cylindrical part 32 surrounding the base part side of the bolt shaft part 11 extending from the insertion hole 31 is crimped, the axial movement of the bolt 10 relative to the washer plate 30 is restricted. Good.

このようにすると、前述した図２に示す耕耘爪締結装置１と同様の効果（耕耘爪８５の装着作業の容易化、回り止め機能の信頼性の向上）を得ることができるとともに、ボルト頭部１３の側面１３ｃの上部は露出状態にあるのでスパナやメガネレンチの使用を可能にすることができる。このため、耕耘爪の交換作業のように前述した耕耘ロータがフリーな状態（例えば、ＰＴＯクラッチが切断されて耕耘ロータがフリーに回転できる状態）の方が作業し易いような場合、手作業でナット４０を締め付けようとすると、その反動で耕耘ロータが回転して作業がやり難くまた危険であるが、ボルト頭部１３は六角形状をしているので、スパナやメガネレンチの使用が可能であり、ボルト頭部１３にスパナ等を係合させることで、耕耘ロータの回動を規制することができ、安全に耕耘爪の着脱作業を行うことができる。   This makes it possible to obtain the same effects as the tillage claw fastening device 1 shown in FIG. 2 described above (ease of attaching the tillage claw 85 and improving the reliability of the rotation preventing function) and the bolt head. Since the upper part of the side surface 13c of 13 is in an exposed state, it is possible to use a spanner or a spectacle wrench. For this reason, when it is easier to work in the state where the above-described tilling rotor is free (for example, the state where the PTO clutch is disengaged and the tilling rotor can rotate freely) as in the replacement work of the tilling claws, When the nut 40 is tightened, the tilling rotor rotates due to the reaction and the work is difficult and dangerous, but the bolt head 13 has a hexagonal shape, so a spanner or a spectacle wrench can be used. By engaging a spanner or the like with the bolt head 13, the rotation of the tilling rotor can be restricted, and the tilling claw can be safely attached and detached.

本発明の一実施の形態に係わる耕耘爪締結装置によって耕耘爪をフランジに固着した耕耘ロータの断面図を示す。Sectional drawing of the tilling rotor which fixed the tilling nail to the flange with the tilling nail fastening device concerning one embodiment of the present invention is shown. 耕耘爪締結装置を示し、同図（ａ）は耕耘爪締結装置の側面図であり、同図（ｂ）は耕耘爪締結装置の平面図であり、同図（ｃ）は耕耘爪締結装置の側面図である。FIG. 2A is a side view of the tilling nail fastening device, FIG. 2B is a plan view of the tilling nail fastening device, and FIG. It is a side view. 他の耕耘爪締結装置を示し、同図（ａ）は他の耕耘爪締結装置の側面図であり、同図（ｂ）は他の耕耘爪締結装置の平面図であり、同図（ｃ）は他の耕耘爪締結装置の側面図である。The other tillage nail fastening device is shown, the figure (a) is a side view of the other tillage nail fastening device, the figure (b) is a top view of the other tillage nail fastening device, and the figure (c) FIG. 10 is a side view of another tillage claw fastening device. 従来の耕耘爪締結装置を示し、同図（ａ）は従来の耕耘爪締結装置の側面図であり、同図（ｂ）は従来の耕耘爪締結装置の断面図である。The conventional tillage nail fastening device is shown, the figure (a) is a side view of the conventional tillage nail fastening device, and the figure (b) is a sectional view of the conventional tillage nail fastening device.

符号の説明Explanation of symbols

１ 耕耘爪締結装置
１０ ボルト
１１ ボルト軸部
１３ ボルト頭部
１３ａ 座面
１３ｂ 頂面
１３ｃ 側面
３０ 座金板
３１ 挿通孔
３２ 筒上部
３３ ボルト回動規制部
４０ ナット
８０ 耕耘軸
８１ フランジ
８２，８３ 爪取付孔
８５ 耕耘爪
８６ 基部
８７，８８ 連通孔
DESCRIPTION OF SYMBOLS 1 Tillage nail fastening device 10 Bolt 11 Bolt shaft part 13 Bolt head part 13a Seat surface 13b Top surface 13c Side surface 30 Washer plate 31 Insertion hole 32 Upper part of cylinder 33 Bolt rotation restricting part 40 Nut 80 Tillage shaft 81 Flange 82, 83 Claw attachment Hole 85 Tillage claw 86 Base 87,88 Communication hole

Claims (3)

耕耘軸に設けられたフランジに耕耘爪を取り付ける耕耘爪締結装置であって、
前記耕耘爪の基部に設けられた一対の連通孔から前記フランジに設けられた一対の各爪取付孔に挿通されてナットと螺合して前記耕耘爪の基部を前記フランジに固着する２本のボルトと、
前記２本のボルトを挿着する座金板とを備え、
該座金板は、両側部に前記ボルトのボルト軸部を挿通する挿通孔と前記ボルトの六角形状のボルト頭部の側面に沿って延びるボルト回動規制部を有し、
前記座金板の前記挿通孔に前記ボルトのボルト軸部を挿通し、前記ボルト回動規制部の内側に前記ボルト頭部を配置して前記ボルトの回動を規制し、前記ボルト頭部の頂面を超えて延びるボルト回動規制部の先端部を内側に折り曲げて前記ボルトの前記ボルト軸部と反対側への移動を規制することを特徴とする耕耘爪締結装置。 A tilling claw fastening device for attaching a tilling claw to a flange provided on a tilling shaft,
Two holes that are inserted from a pair of communicating holes provided in the base portion of the tilling claw into a pair of claw mounting holes provided in the flange and screwed into a nut to fix the base portion of the tilling claw to the flange. Bolts,
A washer plate for inserting the two bolts;
The washer plate has an insertion hole for inserting the bolt shaft portion of the bolt on both sides and a bolt rotation restricting portion extending along the side surface of the hexagonal bolt head of the bolt,
The bolt shaft portion of the bolt is inserted into the insertion hole of the washer plate, the bolt head portion is disposed inside the bolt rotation restricting portion to restrict the rotation of the bolt, and the top of the bolt head portion. A tillage claw fastening device that restricts movement of the bolt to the side opposite to the bolt shaft portion by bending the tip end portion of the bolt rotation restricting portion extending beyond the surface inward. 前記挿通孔はバーリング加工されて前記ボルト回動規制部が配設された側と反対側へ延びる筒状部を備え、前記挿通孔から延びるボルト軸部の基部側を囲む前記筒状部をかしめて、前記座金板に対する前記ボルトの軸方向への移動を規制することを特徴とする請求項１に記載の耕耘爪締結装置。   The insertion hole includes a cylindrical portion that is burring and extends to the opposite side to the side on which the bolt rotation restricting portion is disposed, and includes the cylindrical portion that surrounds the base side of the bolt shaft portion that extends from the insertion hole. 2. The tillage claw fastening device according to claim 1, wherein movement of the bolt in the axial direction relative to the washer plate is restricted. 耕耘軸に設けられたフランジに耕耘爪を取り付ける耕耘爪締結装置であって、
前記耕耘爪の基部に設けられた一対の連通孔から前記フランジに設けられた一対の各爪取付孔に挿通されてナットと螺合して前記耕耘爪の基部を前記フランジに固着する２本のボルトと、
前記２本のボルトを挿通する座金板とを備え、
該座金板は、両側部に前記ボルトのボルト軸部を挿通する挿通孔と前記ボルトの六角形状のボルト頭部の側面に沿って延びるとともに該ボルト頭部の座面側から頂面の手前側に延びるボルト回動規制部を有し、
前記座金板の前記挿通孔に前記ボルトのボルト軸部を挿通し、前記ボルト回動規制部の内側に前記ボルト頭部を配置して前記ボルトの回動を規制し、前記挿通孔はバーリング加工されて前記ボルト回動規制部が配設された側と反対側へ延びる筒状部を備え、前記挿通孔から延びるボルト軸部の基部側を囲む前記筒状部をかしめて、前記座金板に対する前記ボルトの軸方向への移動を規制することを特徴とする耕耘爪締結装置。
A tilling claw fastening device for attaching a tilling claw to a flange provided on a tilling shaft,
Two holes that are inserted from a pair of communicating holes provided in the base portion of the tilling claw into a pair of claw mounting holes provided in the flange and screwed into a nut to fix the base portion of the tilling claw to the flange. Bolts,
A washer plate for inserting the two bolts;
The washer plate extends along a side surface of a hexagonal bolt head of the bolt and an insertion hole through which a bolt shaft portion of the bolt is inserted on both sides, and from the seat surface side of the bolt head to the front side of the top surface A bolt rotation restricting portion extending to
The bolt shaft portion of the bolt is inserted into the insertion hole of the washer plate, the bolt head is disposed inside the bolt rotation restricting portion to restrict the rotation of the bolt, and the insertion hole is burring processed. A cylindrical portion extending to a side opposite to the side on which the bolt rotation restricting portion is disposed, and the cylindrical portion surrounding the base side of the bolt shaft portion extending from the insertion hole is caulked to the washer plate A tillage claw fastening device that restricts movement of the bolt in the axial direction.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015010702A (en) * 2013-07-02 2015-01-19 国陽電興株式会社 Fastening tool for structure
JP2019017273A (en) * 2017-07-12 2019-02-07 松山株式会社 Agricultural machine
JP2020094629A (en) * 2018-12-12 2020-06-18 いすゞ自動車株式会社 Rotation stop structure and manufacturing method of the same

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JPH06335302A (en) * 1993-05-31 1994-12-06 Matsuyama Plow Mfg Co Ltd Device for attaching tilling tine
JP2001317527A (en) * 2000-05-08 2001-11-16 Sumitomo Metal Ind Ltd Whirl-stop mechanism of rotary fastening tool, first and second washers used for it, and mechanism releasing method
JP3247835B2 (en) * 1996-04-24 2002-01-21 松山株式会社 Tillage claw mounting device
JP2002164607A (en) * 2000-11-24 2002-06-07 Furukawa Electric Co Ltd:The Light source constituted of laser diode modules
JP2003302300A (en) * 2001-11-20 2003-10-24 Saginomiya Seisakusho Inc Pressure sensor

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JPS5422662U (en) * 1977-07-19 1979-02-14
JPH03104579U (en) * 1990-02-15 1991-10-30
JPH06335302A (en) * 1993-05-31 1994-12-06 Matsuyama Plow Mfg Co Ltd Device for attaching tilling tine
JP3247835B2 (en) * 1996-04-24 2002-01-21 松山株式会社 Tillage claw mounting device
JP2001317527A (en) * 2000-05-08 2001-11-16 Sumitomo Metal Ind Ltd Whirl-stop mechanism of rotary fastening tool, first and second washers used for it, and mechanism releasing method
JP2002164607A (en) * 2000-11-24 2002-06-07 Furukawa Electric Co Ltd:The Light source constituted of laser diode modules
JP2003302300A (en) * 2001-11-20 2003-10-24 Saginomiya Seisakusho Inc Pressure sensor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015010702A (en) * 2013-07-02 2015-01-19 国陽電興株式会社 Fastening tool for structure
JP2019017273A (en) * 2017-07-12 2019-02-07 松山株式会社 Agricultural machine
JP2020094629A (en) * 2018-12-12 2020-06-18 いすゞ自動車株式会社 Rotation stop structure and manufacturing method of the same

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