JP2013133923A - Screw looseness preventive structure - Google Patents

Screw looseness preventive structure Download PDF

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JP2013133923A
JP2013133923A JP2011286392A JP2011286392A JP2013133923A JP 2013133923 A JP2013133923 A JP 2013133923A JP 2011286392 A JP2011286392 A JP 2011286392A JP 2011286392 A JP2011286392 A JP 2011286392A JP 2013133923 A JP2013133923 A JP 2013133923A
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screw
bolt member
nut
elastic plate
annular elastic
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JP5872888B2 (en
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Yoshinori Ishikawa
義紀 石川
Tatsuya Aoki
達也 青木
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Yazaki Corp
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Yazaki Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a screw looseness preventive structure capable of preventing any looseness without adding any component to a member to be fastened.SOLUTION: The screw looseness preventive structure includes engagement teeth 37 formed on an outer circumferential surface 31 of a shaft part 27 of a bolt member 15, and an annular elastic plate 41 which is provided on a fore end in the screwing direction of a nut body 39 to the bolt member 15, and interposed between the nut body 39 and an LA terminal 13. A plurality of projecting engagement pieces 53 having bent parts projecting inwardly in the radial direction and projecting in the screwing direction while their inwardly projecting ends 51 are located in a vicinity of the root diameter of a female screw, are provided on an inner circumferential surface 47 of the annular elastic plate 41.

Description

本発明は、被締結部材を締結するためのボルト部材とナットとからなるねじの緩み止め構造に関する。   The present invention relates to a loosening prevention structure for a screw comprising a bolt member and a nut for fastening a member to be fastened.

従来より、自動車などのバッテリーに電源用の電線端部に圧着されたＬＡ端子などを接続するためにボルト及びナットが一般的に使用されている。従来の緩み止め構造を備えた接続端子用ナットとして、特許文献１に記載されているものを説明する。   Conventionally, bolts and nuts are generally used to connect an LA terminal or the like that is crimped to the end of a power source wire to a battery such as an automobile. As a connection terminal nut having a conventional locking structure, one described in Patent Document 1 will be described.

図７に示す接続端子用ナットの緩み止め構造では、ナット本体５０１のボルト５１０への螺合完了直前の所定位置で、ナット本体５０１のねじ込みに伴ってＬＡ端子５０３に設けたガイド部材５０５のガイド爪部５０７が、ナット本体５０１の切り欠き溝５０９内を溝深さが浅くなる方向（上側方向）に相対移動し、所定の位置まで移動した段階でガイド爪部５０７が切り欠き溝５０９に噛み込む。従って、ナット本体５０１の締付けトルクを増すことなく、振動などに起因するナット本体５０１の緩みを確実に防止することができる。   In the connection terminal nut loosening prevention structure shown in FIG. 7, the guide of the guide member 505 provided on the LA terminal 503 in accordance with the screwing of the nut body 501 at a predetermined position immediately before the nut body 501 is screwed into the bolt 510. The claw portion 507 relatively moves in the notch groove 509 of the nut body 501 in the direction in which the groove depth becomes shallower (upward direction), and the guide claw portion 507 engages with the notch groove 509 when moving to a predetermined position. Include. Therefore, it is possible to reliably prevent the nut body 501 from being loosened due to vibration or the like without increasing the tightening torque of the nut body 501.

また、緩み止め構造の別の従来例として、特許文献２に記載されるねじの係止装置がある。このねじの係止装置は、図８に示すように、ナット５１３の座面５１５と被締付材５１７における被締付面５１９の間にばね突起座金５２１を介在させ、それによって座面５１５と被締付面５１９を係止するものである。   Moreover, there is a screw locking device described in Patent Document 2 as another conventional example of the locking structure. As shown in FIG. 8, this screw locking device has a spring protrusion washer 521 interposed between a seating surface 515 of a nut 513 and a tightened surface 519 of the tightened material 517, thereby The fastening surface 519 is locked.

すなわち、ばね突起座金５２１は一面に鉛直な突起５２３を設け、それが当接する被締付面５１９にノッチ５２５を形成し、それに突起５２３を嵌合している。また、他の面には、その同心円上に先端５２７を締付方向に４５度よりも小角度のばね突起５２９を設け、それが当接する座面５１５の同心円上に断面視がＶの字状で斜面が４５度よりも小角度のくぼみ５３１を形成している。   That is, the spring protrusion washer 521 is provided with a vertical protrusion 523 on one surface, a notch 525 is formed on the tightened surface 519 with which the protrusion 523 comes into contact, and the protrusion 523 is fitted thereto. On the other surface, a tip 527 is provided on the concentric circle, and a spring protrusion 529 having a smaller angle than 45 degrees in the tightening direction is provided, and a V-shaped cross-sectional view is formed on the concentric circle of the seating surface 515 with which it contacts. The slope forms a recess 531 having a smaller angle than 45 degrees.

締付完了において、ばね突起５２９はくぼみ５３１に嵌入している。ナット５１３がゆるむと、ばね突起５２９の先端５２７がくぼみ５３１の締付側斜面５３３を押圧し、ねじは確実に係止する。工具を使用してゆるめると、ばね突起５２９は締付側斜面上をたわんで上端へ滑脱し座面５１５、被締付面５１９は順次分離する。   When the tightening is completed, the spring protrusion 529 is fitted in the recess 531. When the nut 513 is loosened, the tip 527 of the spring projection 529 presses the tightening side inclined surface 533 of the recess 531 and the screw is securely locked. When the tool is loosened using a tool, the spring protrusion 529 is bent on the tightening side slope and slides to the upper end, so that the seat surface 515 and the tightened surface 519 are sequentially separated.

特開平１１−３５４１７９号公報JP 11-354179 A 実開平６−８０９１３号公報Japanese Utility Model Publication No. 6-80913

しかしながら、図７に示した接続端子用ナットの緩み止め構造は、ガイド部材５０５をＬＡ端子５０３に設ける必要があり、専用のＬＡ端子以外では使用することができない。また、図８に示したねじの係止装置は、被締付面５１９にノッチ５２５を形成しなければならず、いずれの技術も被締結部材であるＬＡ端子５０３や被締付材５１７に構成要素を付加しなければならい。   However, the connection terminal nut loosening prevention structure shown in FIG. 7 requires the guide member 505 to be provided on the LA terminal 503, and cannot be used other than a dedicated LA terminal. Further, in the screw locking device shown in FIG. 8, a notch 525 must be formed on the tightening surface 519, and any technique is configured on the LA terminal 503 or the tightening member 517 that is the tightening member. You must add an element.

本発明は上記状況に鑑みてなされたもので、その目的は、被締結部材に構成要素を付加せずに緩みが防止されるねじの緩み止め構造を提供することにある。   The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a screw locking prevention structure in which loosening is prevented without adding a component to a fastened member.

本発明に係る上記目的は、下記構成により達成される。
（１） ボルト部材の軸部の外周面に形成された係合歯と、ナット本体の前記ボルト部材への螺合方向先端部に設けられ、前記ナット本体と被締結部材との間に介在する環状弾性板と、を有し、前記環状弾性板の内周面には、半径方向内方に突出すると共に螺合方向に突出する屈曲部を有し、且つその内方突出端がめねじの谷径近傍に位置するように形成された複数の突状係合片を備えることを特徴とするねじの緩み止め構造。 The above object of the present invention is achieved by the following configuration.
(1) An engagement tooth formed on the outer peripheral surface of the shaft portion of the bolt member and a tip end portion in a screwing direction of the nut main body to the bolt member, are interposed between the nut main body and the fastened member. An annular elastic plate, and an inner peripheral surface of the annular elastic plate has a bent portion that protrudes inward in the radial direction and protrudes in the screwing direction, and an inward protruding end thereof is a valley of a female screw. A screw loosening prevention structure comprising a plurality of protruding engagement pieces formed so as to be positioned near a diameter.

上記（１）の構成のねじの緩み止め構造によれば、ねじを締め付けると、突状係合片の屈曲部が潰れて突出端が半径方向内方へ変位する。半径方向内方へ変位した突状係合片の内方突出端がボルト部材の係合歯に噛み合い、ボルト部材とナット本体との相対回転が規制されるので、ねじの緩みが防止される。また、潰された屈曲部自体が、スプリングワッシャの機能を有する。   According to the screw locking structure having the configuration (1), when the screw is tightened, the bent portion of the protruding engagement piece is crushed and the protruding end is displaced radially inward. The inward protruding end of the projecting engagement piece displaced inward in the radial direction meshes with the engagement tooth of the bolt member, and the relative rotation between the bolt member and the nut body is restricted, so that loosening of the screw is prevented. Further, the crushed bent part itself has a function of a spring washer.

（２） 上記（１）の構成のねじの緩み止め構造であって、前記係合歯は、前記内方突出端が噛み合った際に、ねじ締付方向よりもねじ緩み方向に回転するのを強く阻止することができる断面鋸歯形状に形成されることを特徴とするねじの緩み止め構造。 (2) The screw loosening prevention structure having the configuration of (1) above, wherein the engagement teeth rotate in the screw loosening direction rather than the screw fastening direction when the inward protruding ends are engaged with each other. A structure for preventing loosening of a screw, characterized in that the screw is formed in a sawtooth shape that can be strongly blocked.

上記（２）の構成のねじの緩み止め構造によれば、内方突出端が係合歯と係合した後も、ねじ締付方向の回転は内方突出端が係合歯の傾斜面に当たるので可能となるが、ねじ緩み方向の回転は内方突出端の側縁が係合歯の逆鉤部に当接して強固に阻止することができる。   According to the structure for preventing the loosening of the screw having the configuration (2), even when the inward protruding end is engaged with the engaging tooth, the inward protruding end is brought into contact with the inclined surface of the engaging tooth even after the inward protruding end is engaged with the engaging tooth. Therefore, the rotation in the screw loosening direction can be firmly prevented by the side edge of the inward protruding end coming into contact with the reverse flange portion of the engaging tooth.

本発明に係るねじの緩み止め構造によれば、被締結部材に構成要素を付加せずにねじの緩みを防止できる。   According to the loosening prevention structure of the screw according to the present invention, it is possible to prevent the loosening of the screw without adding a component to the fastened member.

以上、本発明について簡潔に説明した。更に、以下に説明される発明を実施するための形態（以下、「実施形態」という。）を添付の図面を参照して通読することにより、本発明の詳細は更に明確化されるであろう。   The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

本発明の一実施形態に係るねじの緩み止め構造を備えたボルト部材及びナットとＬＡ端子の分解斜視図である。It is a disassembled perspective view of the bolt member provided with the screw locking structure which concerns on one Embodiment of this invention, a nut, and LA terminal. （ａ）は図１に示したボルト部材の側面図、（ｂ）は（ａ）におけるＡ−Ａ断面矢視図である。(A) is a side view of the bolt member shown in FIG. 1, (b) is an AA cross-sectional arrow view in (a). （ａ）は図１に示したナット本体を下面側から見た平面図、（ｂ）は（ａ）におけるＢ部拡大図である。(A) is the top view which looked at the nut main body shown in FIG. 1 from the lower surface side, (b) is the B section enlarged view in (a). （ａ）は図１に示したナット本体の側面図、（ｂ）は（ａ）におけるＣ部拡大断面図である。(A) is a side view of the nut main body shown in FIG. 1, (b) is the C section expanded sectional view in (a). （ａ）は図１に示したボルト部材及びナットにおけるナット締結前の縦断面図、（ｂ）はナット締結後の縦断面図である。(A) is the longitudinal cross-sectional view before the nut fastening in the volt | bolt member and nut shown in FIG. 1, (b) is the longitudinal cross-sectional view after a nut fastening. （ａ）は図５（ｂ）におけるＤ−Ｄ断面矢視図、（ｂ）は（ａ）におけるＥ部拡大図である。(A) is DD sectional view taken on the line in FIG.5 (b), (b) is the E section enlarged view in (a). 従来の接続端子用ナットの緩み止め構造を表した断面図である。It is sectional drawing showing the conventional locking structure of the connection terminal nut. 従来のねじの係止装置を表した断面図である。It is sectional drawing showing the conventional locking device of the screw.

以下、本発明の一実施形態に係るねじの緩み止め構造を図面を参照して説明する。
本実施形態に係るねじの緩み止め構造は、自動車などのバッテリーに電源用の電線端部１１に圧着された被締結部材であるＬＡ端子１３などを接続するために好適に用いることができる。このねじの緩み止め構造には、主要部材となるボルト部材１５とナット１７とが使用される。 A screw locking structure according to an embodiment of the present invention will be described below with reference to the drawings.
The screw locking structure according to the present embodiment can be suitably used to connect the LA terminal 13 or the like that is a member to be fastened to a power source wire end 11 to a battery such as an automobile. A bolt member 15 and a nut 17 serving as main members are used for the screw locking structure.

図１に示すように、ＬＡ端子１３は、圧着部１９が一体的に形成され、この圧着部１９を電線端部１１に圧着することで電線２１と電気的に接続される。ＬＡ端子１３に設けられたボルト取付孔２３には、ＬＡ端子１３を電気的に接続しようとするボルト部材１５が挿通される。ＬＡ端子１３は、ボルト取付孔２３に挿通されたボルト部材１５にナット１７が螺合されてボルト部材１５に締結される。   As shown in FIG. 1, the LA terminal 13 is integrally formed with a crimping portion 19, and is electrically connected to the electric wire 21 by crimping the crimping portion 19 to the wire end portion 11. A bolt member 15 for electrically connecting the LA terminal 13 is inserted into the bolt mounting hole 23 provided in the LA terminal 13. The LA terminal 13 is fastened to the bolt member 15 by a nut 17 being screwed into the bolt member 15 inserted through the bolt mounting hole 23.

図２（ａ）に示すように、ボルト部材１５は、例えばヒューズブロック６０に埋設される方形状の頭部２５を有し、頭部２５には軸部２７が連設される。つまり、本実施形態では、所謂四角ボルトとなっている。軸部２７の外周面３１には、おねじ３３が形成される。
図２（ｂ）に示すように、頭部２５とおねじ３３との間の軸部２７の外周面３１には、半径方向外方に突出する複数（本実施形態では１２個）の係合歯３７が円周方向に等間隔で形成される。本実施形態では、係合歯３７の外径は、軸部２７の外径と略同一とされている。 As shown in FIG. 2A, the bolt member 15 has, for example, a rectangular head portion 25 embedded in the fuse block 60, and the shaft portion 27 is connected to the head portion 25. That is, in this embodiment, it is what is called a square bolt. A male screw 33 is formed on the outer peripheral surface 31 of the shaft portion 27.
As shown in FIG. 2B, a plurality of (12 in this embodiment) engaging teeth projecting outward in the radial direction are formed on the outer peripheral surface 31 of the shaft portion 27 between the head portion 25 and the male screw 33. 37 are formed at equal intervals in the circumferential direction. In the present embodiment, the outer diameter of the engagement tooth 37 is substantially the same as the outer diameter of the shaft portion 27.

図３及び図４に示すように、ナット１７は、ナット本体３９と環状弾性板４１とからなる。ナット本体３９にはめねじ４３が形成される。このめねじ４３は、ボルト部材１５のおねじ３３とでねじを構成する。   As shown in FIGS. 3 and 4, the nut 17 includes a nut body 39 and an annular elastic plate 41. An internal thread 43 is formed on the nut body 39. The female screw 43 forms a screw with the male screw 33 of the bolt member 15.

環状弾性板４１は、ナット本体３９のボルト部材１５への螺合方向先端部４５に設けられ、ナット本体３９とＬＡ端子１３との間に介在する。環状弾性板４１は、例えば溶接によってナット本体３９に固定される。   The annular elastic plate 41 is provided at the tip 45 of the nut body 39 in the screwing direction with the bolt member 15, and is interposed between the nut body 39 and the LA terminal 13. The annular elastic plate 41 is fixed to the nut body 39 by welding, for example.

図３（ａ）に示すように、環状弾性板４１の内周面４７は、半径方向内方に突出すると共に螺合方向に突出する屈曲部４９を有し、且つその内方突出端５１がめねじ４３の谷径近傍に位置する複数（本実施形態では６つ）の突状係合片５３が形成される。図３（ｂ）に示すように、突状係合片５３は、短冊片状に形成され、内方突出端５１の左右が一対の側縁５５となる。   As shown in FIG. 3A, the inner peripheral surface 47 of the annular elastic plate 41 has a bent portion 49 that protrudes inward in the radial direction and protrudes in the screwing direction, and the inwardly protruding end 51 is the first end. A plurality of (six in this embodiment) protruding engagement pieces 53 are formed in the vicinity of the valley diameter of the screw 43. As shown in FIG. 3B, the protruding engagement piece 53 is formed in a strip shape, and the left and right sides of the inward protruding end 51 form a pair of side edges 55.

図２（ｂ）に示したように、ボルト部材１５に形成される係合歯３７は、突状係合片５３の内方突出端５１が噛み合った際に、ねじ締付方向よりもねじ緩み方向に回転するのを強く阻止することができる断面鋸歯形状に形成されている。すなわち、係合歯３７は、傾斜面５７と逆鉤部５９とからなる。そこで、突状係合片５３は、側縁５５が逆鉤部５９に当接する方向の回転が規制され、その逆方向の回転が許容される。   As shown in FIG. 2B, the engagement teeth 37 formed on the bolt member 15 are looser than the screw tightening direction when the inwardly projecting end 51 of the projecting engagement piece 53 is engaged. It is formed in a sawtooth shape in cross section that can strongly prevent rotation in the direction. That is, the engaging tooth 37 is composed of the inclined surface 57 and the reverse flange 59. Therefore, the protruding engagement piece 53 is restricted from rotating in the direction in which the side edge 55 comes into contact with the reverse flange 59, and is allowed to rotate in the reverse direction.

図４（ｂ）に示すように、突状係合片５３に形成される螺合方向に突出する屈曲部４９は、本実施形態では傾斜片部６１と、水平片部６３とからなる断面略Ｓ字状に形成される。このほか、屈曲部４９は、断面略Ｖ字状に形成することもできる。すなわち、屈曲部４９は潰されることで、突状係合片５３の内方突出端５１が半径方向内方へ変位すればよい。   As shown in FIG. 4B, the bent portion 49 formed in the projecting engagement piece 53 and projecting in the screwing direction has a cross-section substantially composed of an inclined piece portion 61 and a horizontal piece portion 63 in this embodiment. It is formed in an S shape. In addition, the bending part 49 can also be formed in a substantially V-shaped cross section. That is, the bent portion 49 is crushed so that the inward protruding end 51 of the protruding engagement piece 53 is displaced radially inward.

次に、上記構成を有するねじの緩み止め構造の作用を説明する。
図５（ａ）に示すように、ヒューズブロック６０に垂設されたボルト部材１５にＬＡ端子１３を固定するには、ＬＡ端子１３を貫通したボルト部材１５にナット１７を締め付ける。このとき、ボルト部材１５の係合歯３７は、ＬＡ端子１３のボルト取付孔２３から表出部６５が外部に露出する。 Next, the operation of the screw locking structure having the above configuration will be described.
As shown in FIG. 5A, in order to fix the LA terminal 13 to the bolt member 15 suspended from the fuse block 60, a nut 17 is tightened on the bolt member 15 penetrating the LA terminal 13. At this time, the exposed portion 65 of the engaging tooth 37 of the bolt member 15 is exposed to the outside from the bolt mounting hole 23 of the LA terminal 13.

この状態でボルト部材１５にナット１７を螺合して締め付けるが、突状係合片５３はおねじ３３とは接触しない。突状係合片５３がＬＡ端子１３に接触した後、ナット１７が更に締め付けられると、図５（ｂ）に示すように、屈曲部４９が潰れて突状係合片５３の内方突出端５１が半径方向内方へ変位する。   In this state, the nut 17 is screwed onto the bolt member 15 and tightened, but the protruding engagement piece 53 does not contact the male screw 33. When the nut 17 is further tightened after the projecting engagement piece 53 comes into contact with the LA terminal 13, the bent portion 49 is crushed and the inward projecting end of the projecting engagement piece 53, as shown in FIG. 51 is displaced radially inward.

図６（ａ）に示すように、半径方向内方へ変位した内方突出端５１は、ボルト部材１５の係合歯３７に噛み合う。
内方突出端５１が係合歯３７と係合した後も、図６（ｂ）における矢印ａのねじ締付方向の回転は、内方突出端５１が係合歯３７の傾斜面５７に当たるので可能となる。一方、図６（ｂ）における矢印ｂのねじ緩み方向の回転は、内方突出端５１の側縁５５が係合歯３７の逆鉤部５９に当接して強固に阻止することができる。 As shown in FIG. 6A, the inward projecting end 51 displaced inward in the radial direction meshes with the engagement teeth 37 of the bolt member 15.
Even after the inward protruding end 51 is engaged with the engaging teeth 37, the rotation of the arrow a in the screw tightening direction in FIG. 6B causes the inward protruding end 51 to contact the inclined surface 57 of the engaging teeth 37. It becomes possible. On the other hand, the rotation in the screw loosening direction of the arrow b in FIG. 6B can be firmly prevented by the side edge 55 of the inward protruding end 51 coming into contact with the reverse flange 59 of the engaging tooth 37.

これにより、ボルト部材１５とナット本体３９との緩み方向の相対回転が規制され、ねじの緩みが防止される。また、潰された屈曲部４９自体が、スプリングワッシャの機能も有することで、ねじを一層緩み難くすることができる。
従って、上述した本実施形態に係るねじの緩み止め構造によれば、被締結部材であるＬＡ端子１３に構成要素を付加せずにねじの緩みを防止できる。 Thereby, the relative rotation of the bolt member 15 and the nut main body 39 in the loosening direction is restricted, and the loosening of the screw is prevented. Further, since the crushed bent portion 49 itself has a function of a spring washer, it is possible to make the screw more difficult to loosen.
Therefore, according to the above-described screw loosening prevention structure according to the present embodiment, it is possible to prevent loosening of the screw without adding a component to the LA terminal 13 which is a fastened member.

なお、本発明のねじの緩み止め構造は、上述した実施形態に限定されるものではなく、適宜、変形、改良等が可能である。その他、上述した実施形態における各構成要素の材質、形状、寸法、数、配置箇所等は本発明を達成できるものであれば任意であり、限定されない。   Note that the screw locking structure of the present invention is not limited to the above-described embodiment, and can be appropriately modified and improved. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

例えば、上記実施形態においては、ボルト部材１５の係合歯３７が、頭部２５とおねじ３３との間の軸部２７の外周面３１に形成されているが、本発明はこれに限定されるものではなく、被締結部材の厚みに応じて軸部２７の軸方向における形成位置が適宜変更される。即ち、係合歯３７は、ナット１７の螺合完了時に環状弾性板４１の突状係合片５３が対向する軸部２７の外周面３１に形成されていればよい。そこで、係合歯３７は、軸部２７の基部から軸方向に沿って連続形成することもでき、軸部２７の中間部に部分的に形成することもできる。
また、係合歯３７や突状係合片５３の形状も上記実施形態の形状に限らず、ねじ緩み方向に回転するのを阻止することができる形状であれば種々の形状を採りうることは勿論である。 For example, in the above embodiment, the engaging teeth 37 of the bolt member 15 are formed on the outer peripheral surface 31 of the shaft portion 27 between the head portion 25 and the male screw 33, but the present invention is limited to this. It is not a thing and the formation position in the axial direction of the axial part 27 is suitably changed according to the thickness of a to-be-fastened member. That is, the engagement teeth 37 only need to be formed on the outer peripheral surface 31 of the shaft portion 27 to which the protruding engagement piece 53 of the annular elastic plate 41 faces when the nut 17 is screwed. Therefore, the engaging teeth 37 can be continuously formed along the axial direction from the base portion of the shaft portion 27, or can be partially formed at an intermediate portion of the shaft portion 27.
Further, the shapes of the engagement teeth 37 and the protruding engagement pieces 53 are not limited to the shapes of the above-described embodiments, and various shapes can be adopted as long as the shapes can prevent rotation in the screw loosening direction. Of course.

１３…ＬＡ端子（被締結部材）
１５…ボルト部材
２７…軸部
３１…外周面
３７…係合歯
３９…ナット本体
４１…環状弾性板
４３…めねじ
４５…螺合方向先端部
４７…内周面
４９…屈曲部
５１…内方突出端
５３…突状係合片 13 ... LA terminal (member to be fastened)
DESCRIPTION OF SYMBOLS 15 ... Bolt member 27 ... Shaft part 31 ... Outer peripheral surface 37 ... Engagement tooth 39 ... Nut main body 41 ... Annular elastic board 43 ... Female thread 45 ... Screwing direction front-end | tip part 47 ... Inner peripheral surface 49 ... Bending part 51 ... Inward Protruding end 53 ... protruding engaging piece

Claims (2)

ボルト部材の軸部の外周面に形成された係合歯と、
ナット本体の前記ボルト部材への螺合方向先端部に設けられ、前記ナット本体と被締結部材との間に介在する環状弾性板と、を有し、
前記環状弾性板の内周面には、半径方向内方に突出すると共に螺合方向に突出する屈曲部を有し、且つその内方突出端がめねじの谷径近傍に位置するように形成された複数の突状係合片を備えることを特徴とするねじの緩み止め構造。 Engaging teeth formed on the outer peripheral surface of the shaft portion of the bolt member;
An annular elastic plate provided at a front end portion of the nut body in the screwing direction to the bolt member, and interposed between the nut body and the fastened member;
The inner peripheral surface of the annular elastic plate has a bent portion that protrudes inward in the radial direction and protrudes in the screwing direction, and the inwardly protruding end is formed in the vicinity of the root diameter of the female screw. A screw locking structure comprising a plurality of protruding engagement pieces. 請求項１記載のねじの緩み止め構造であって、
前記係合歯は、前記内方突出端が噛み合った際に、ねじ締付方向よりもねじ緩み方向に回転するのを強く阻止することができる断面鋸歯形状に形成されることを特徴とするねじの緩み止め構造。 The screw locking structure according to claim 1,
The screw is characterized in that the engagement tooth is formed in a sawtooth shape in cross section that can strongly prevent rotation in the screw loosening direction rather than the screw tightening direction when the inward protruding ends are engaged with each other. Anti-loosening structure.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5816767B1 (en) * 2015-03-13 2015-11-18 周 加藤 nut
CN110397660A (en) * 2019-08-29 2019-11-01 海盐盛信标准件有限公司 A kind of split type fastening nut of mechanical equipment
CN111981022A (en) * 2019-05-23 2020-11-24 舍弗勒技术股份两合公司 Anti-loose nut

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JP2000009127A (en) * 1998-06-23 2000-01-11 Yuusu Kitaura:Kk Fastener and screw fastening part protecting device
JP2009121564A (en) * 2007-11-13 2009-06-04 Honda Motor Co Ltd Fastening device

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Publication number Priority date Publication date Assignee Title
JPS621373U (en) * 1985-06-20 1987-01-07
JPH09291924A (en) * 1996-04-30 1997-11-11 Mitsubishi Electric Corp Fastening mechanism with lock
JP2000009127A (en) * 1998-06-23 2000-01-11 Yuusu Kitaura:Kk Fastener and screw fastening part protecting device
JP2009121564A (en) * 2007-11-13 2009-06-04 Honda Motor Co Ltd Fastening device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5816767B1 (en) * 2015-03-13 2015-11-18 周 加藤 nut
WO2016148266A1 (en) * 2015-03-13 2016-09-22 周 加藤 Nut
CN111981022A (en) * 2019-05-23 2020-11-24 舍弗勒技术股份两合公司 Anti-loose nut
CN111981022B (en) * 2019-05-23 2024-03-08 舍弗勒技术股份两合公司 Lock nut
CN110397660A (en) * 2019-08-29 2019-11-01 海盐盛信标准件有限公司 A kind of split type fastening nut of mechanical equipment
CN110397660B (en) * 2019-08-29 2024-04-09 海盐盛信标准件股份有限公司 Split type fastening nut for mechanical equipment

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