JP2011047482A - Coupling member with looseness preventive mechanism - Google Patents

Coupling member with looseness preventive mechanism Download PDF

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JP2011047482A
JP2011047482A JP2009197231A JP2009197231A JP2011047482A JP 2011047482 A JP2011047482 A JP 2011047482A JP 2009197231 A JP2009197231 A JP 2009197231A JP 2009197231 A JP2009197231 A JP 2009197231A JP 2011047482 A JP2011047482 A JP 2011047482A
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groove
coupling member
fastened
nut
coil spring
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Minoru Saito
實 齋藤
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HNS ENGINEERING KK
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HNS ENGINEERING KK
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Abstract

<P>PROBLEM TO BE SOLVED: To actuate a looseness preventive mechanism by attaching a coupling member to a member to be fastened. <P>SOLUTION: The coupling member 1 with the looseness preventive mechanism is configured as follows: a male threaded portion 62 of a bolt (first coupling member) 6 is passed through-holes formed in the members to be fastened 3 and 4 to face the bolt 6 through the members 3 and 4, and when fastening to the bolt 6 is established across the members 3 and 4, a resilient member 2 which is set in a groove 14 and bulged from a plane portion 11 while being formed in the plane portion 11 confronting one of the members 3 and 4 abuts to one of the members 3 and 4, and when fastening of the members 3 and 4 by the bolt 6 is completed, a pressure by the resilient member 2 set in the groove 14 is applied to a thread part of the male threaded portion 62 of the bolt 6 such that a friction force of the thread part of the male threaded portion 62 of the bolt 6 increases. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、結合部材により被締結部材を締結した際に、被締結部材の締結の緩みを防止する緩み防止機構付き結合部材に関する。   The present invention relates to a coupling member with a loosening prevention mechanism for preventing loosening of a fastened member when the fastened member is fastened by the coupling member.

従来の、ボルト或いはナットの緩みを防止するための技術として、図１８に示す技術が開示されている。図１８では、ナット１２２等の頭部を被覆して、ナット１２２等が緩解されることを防止している。緩解防止具１０１はプッシュナット１０２とリテーナ１０３からなり、２枚のフランジ１０７、１０８に挿通される有頭ボルト１０９のねじ軸１１０に外嵌される。図１８に示すように、２枚のフランジ１０７、１０８に有頭ボルト１０９のねじ軸１１０を挿通し、このねじ軸１１０にナット１２２を螺締した後、ねじ軸１１０の先端にプッシュナット１０２の軸心を合わせて押し付ける。リテーナ３の中止穴１１５は、口部で大径になる段付穴に形成され、この大径部１１６に中心穴１１５の口からプッシュナット１０２をその反返り面１１１を中心穴の奧に向けて挿入する。   As a conventional technique for preventing loosening of a bolt or nut, a technique shown in FIG. 18 is disclosed. In FIG. 18, the heads of the nuts 122 and the like are covered to prevent the nuts 122 and the like from being loosened. The loosening prevention tool 101 includes a push nut 102 and a retainer 103 and is externally fitted to a screw shaft 110 of a headed bolt 109 inserted through two flanges 107 and 108. As shown in FIG. 18, the screw shaft 110 of the headed bolt 109 is inserted into the two flanges 107 and 108, and a nut 122 is screwed onto the screw shaft 110, and then the push nut 102 is attached to the tip of the screw shaft 110. Align and push the axis. The retaining hole 115 of the retainer 3 is formed as a stepped hole having a large diameter at the mouth portion. The push nut 102 is directed to the large diameter portion 116 from the mouth of the center hole 115 and the rebound surface 111 is directed to the flange of the center hole. Insert.

そして、プッシュナット１０２の外周部１０４を中心穴１１５の段付面１１７に全周にわたって当接させた状態で、大径部１１６を、全周にわたって、例えばヘラ加工により、プッシュナット１０２の周縁部に被さるように内側に折り曲げ、プッシュナット保持溝１１４が形成され、プッシュナット２がプッシュナット保持溝１１４に軸心周りに回転自在に保持される。そして、さらに、リテーナ１０３がナット１２２の端面１２３に受け止められるまでねじ軸１１０に押し込まれる。これにより、プッシュナット１０２の爪１０６がねじ軸１１０のねじ溝に嵌り込み、プッシュナット１０２が緩解防止具１の移動方向を一方向、即ち、緩解防止具１をねじ軸１１０に押し込む方向に制限するように作用するのでナット１２２がねじ軸１１０の先端側に移動することが防止される。   Then, in a state where the outer peripheral portion 104 of the push nut 102 is in contact with the stepped surface 117 of the center hole 115 over the entire circumference, the large-diameter portion 116 is formed over the entire circumference by, for example, spatula processing. The push nut holding groove 114 is formed by bending the inner side so as to cover the push nut 2, and the push nut 2 is held in the push nut holding groove 114 so as to be rotatable around the axis. Further, the retainer 103 is pushed into the screw shaft 110 until it is received by the end surface 123 of the nut 122. As a result, the claw 106 of the push nut 102 fits into the thread groove of the screw shaft 110, and the push nut 102 restricts the moving direction of the anti-loosening prevention tool 1 to one direction, that is, the direction of pushing the anti-loosening prevention tool 1 into the screw shaft 110. As a result, the nut 122 is prevented from moving to the tip side of the screw shaft 110.

また、図１９では、ボルトとナットの緩みを防止するために座金に緩み防止機構を設ける技術が開示されている。被締結部材２０８ａ、２０８ｂを緩み止め座金２０１を用いてボルト２０６とナット２０７で締結する場合、被締結部材２０８ａ、２０８ｂのボルト孔２０９にボルト２０６の雄ねじ部２０６ａを挿通してボルト２０６の雄ねじ部２０６ａに緩み止め座金２０１を外嵌し、ナット２０７をボルト２０６の雄ねじ部２０６ａに螺合して緩み止め座金２０１の端面２０２ｂを被締結部材２０８ａの表面に当接させる。   Further, FIG. 19 discloses a technique in which a loosening prevention mechanism is provided on a washer in order to prevent loosening of a bolt and a nut. When the fastened members 208a and 208b are fastened with the bolts 206 and the nuts 207 using the locking washers 201, the male screw portions 206a of the bolts 206 are inserted into the bolt holes 209 of the fastened members 208a and 208b. The looseness washer 201 is externally fitted to 206a, and the nut 207 is screwed into the male thread portion 206a of the bolt 206 so that the end face 202b of the looseness washer 201 is brought into contact with the surface of the fastening member 208a.

次いで、ボルト２０６とナット２０７の雄ねじ部２０６ａと雌ねじ部２０７ａを更に螺合して締め付け、被締結部材２０８ａ、２０８ｂをボルト２０６とナット２０７で締結すると、緩み止め座金２０１の端面２０２ｂが被締結部材２０８ａの表面に押しつけられるとともに、ナット２０７と当接した緩み止め座金２０１の端面２０２ａ側の座金本体２０２の撓み片部２０５ａが、スリット部２０４の底部２０４ｂを支点にスリット部２０４側へ撓み、図１９に示すように、ナット２０７もスリット部２０４の開口端部２０４ａ側へ傾斜する。その結果、スリット部２０４の開口端部２０４ａ側で緩み止め座金２０１と当接した側の雌ねじ部２０７ａとボルト２０６の雄ねじ部２０６ａの螺合部分（図中Ｘ部分）、及び、スリット部２０４の開口端部２０４ａと対称位置で緩み止め座金２０１と当接していない側の雌ねじ部２０７ａと雄ねじ部２０６ａの螺合部分（図中Ｙ部分）のバックラッシＸが無くなり、螺合部分Ｙ、Ｙ部分において雌ねじ部２０７ａと雄ねじ部２０６ａが密着する。   Next, when the male screw portion 206a and the female screw portion 207a of the bolt 206 and the nut 207 are further screwed together and fastened, and the fastened members 208a and 208b are fastened by the bolt 206 and the nut 207, the end face 202b of the locking washer 201 is fastened. The bending piece 205a of the washer body 202 on the end face 202a side of the locking stopper washer 201 that is pressed against the surface of 208a and abutted against the nut 207 is bent toward the slit 204 with the bottom 204b of the slit 204 as a fulcrum. As shown in FIG. 19, the nut 207 is also inclined toward the opening end portion 204 a side of the slit portion 204. As a result, the threaded portion (X portion in the figure) of the female screw portion 207a on the side of the slit portion 204 that contacts the loosening washer 201 on the opening end portion 204a side and the male screw portion 206a of the bolt 206, and the slit portion 204 The backlash X of the threaded portion (Y portion in the figure) of the female screw portion 207a and the male screw portion 206a on the side that is not in contact with the loosening washer 201 at a position symmetrical to the opening end portion 204a is eliminated. The female screw portion 207a and the male screw portion 206a are in close contact with each other.

特開２００７−２４７７４５（段落００７０、段落００７４から段落００７６、段落００８５、段落００８６、図１）JP 2007-247745 (paragraph 0070, paragraph 0074 to paragraph 0076, paragraph 0085, paragraph 0086, FIG. 1) 特開２００２−３９１４２（段落００２９、図３）JP 2002-39142 (paragraph 0029, FIG. 3)

しかしながら、図１８に示す技術では、２枚のフランジ１０７、１０８に有頭ボルト１０９のねじ軸１１０を挿通し、ねじ軸１１０にナット１２２を螺締した後に、緩解防止具１０１であるプッシュナット１０２及びリテーナ１０３をねじ軸１１０に押し込んでいるため、有頭ボルト１０９のねじ軸１１０にナット１２２を螺締する工程とは別に緩解防止具１０１を取り付ける工程を設けなければならず作業工程が煩雑になり作業時間の短縮化が図り難い。また、有頭ボルト１０９及びナット１２２以外に緩解防止具１０１を取り付けるため、有頭ボルト１０９及びナット１２２に他の部材近接している場合には緩解防止具１０１を取り付けることが難しい場合にある。   However, in the technique shown in FIG. 18, the screw nut 110 of the headed bolt 109 is inserted into the two flanges 107 and 108, and the nut 122 is screwed onto the screw shaft 110, and then the push nut 102 that is the loosening prevention tool 101. In addition, since the retainer 103 is pushed into the screw shaft 110, a step of attaching the anti-loosening prevention tool 101 must be provided separately from the step of screwing the nut 122 onto the screw shaft 110 of the headed bolt 109, and the work process is complicated. It is difficult to shorten the work time. In addition, since the loosening prevention tool 101 is attached in addition to the headed bolt 109 and the nut 122, it may be difficult to attach the loosening prevention tool 101 when other members are close to the headed bolt 109 and the nut 122.

また、図１９に示す技術では、座金本体２０２の撓み片部２０５ａ及びナット２０７がスリット部２０４の開口端部２０４ａ側に傾斜させて、バックラッシュをなくし雄ねじ部と雌ねじ部の螺合部分を密着しているため、被締結部材に対してボルト２０６及びナット２０７が若干傾斜した状態で取り付けられたことになる。そのため本来取り付けられた状態に対して不自然な状態となっており、規則的に加わる振動等以外の外力に対してはボルト２０６及びナット２０７による締結力を維持し難くなる可能性が高い。また、座金本体２０２の外周壁２０２ｃ側から座金本体２０２の軸心側に向けてスリット２０４が所定深さ切欠形成されているため、雄ねじ部２０６ａを雌ねじ部２０７ａに螺合に際しての締め付け方によっては座金本体２０２の撓み片部２０５ａに割れ等が発生する可能性も否定できない。   Further, in the technique shown in FIG. 19, the bent piece 205a and the nut 207 of the washer main body 202 are inclined toward the opening end 204a side of the slit portion 204 so that backlash is eliminated and the screwed portions of the male screw portion and the female screw portion are brought into close contact with each other. Therefore, the bolt 206 and the nut 207 are attached to the fastened member in a slightly inclined state. Therefore, it is in an unnatural state with respect to the originally attached state, and there is a high possibility that it is difficult to maintain the fastening force by the bolt 206 and the nut 207 with respect to external forces other than vibrations that are regularly applied. In addition, since the slit 204 is notched to a predetermined depth from the outer peripheral wall 202c side of the washer body 202 toward the axial center side of the washer body 202, depending on how to tighten the male screw portion 206a to the female screw portion 207a. The possibility that a crack or the like occurs in the bent piece 205a of the washer body 202 cannot be denied.

本発明、上記の事情に鑑みなされたものであり、結合部材の取り付けと同時に緩み防止作用を発揮することを可能にし、フランジ等の被締結部材に対して結合部材を緩み難い状態で締結する（取り付ける）ことを可能にする緩み防止機構付き結合部材を提供することを目的とする。   The present invention has been made in view of the above-described circumstances, and enables a loosening prevention action to be exhibited simultaneously with the attachment of the coupling member, and is fastened to the fastening member such as a flange in a state in which the coupling member is difficult to loosen ( It is an object of the present invention to provide a coupling member with a loosening prevention mechanism that enables attachment).

上記の目的を達成するために、請求項１に記載の発明は、頭部と該頭部と連続する雄ねじ部とを備えた第一結合部材と、被締結部材を介して対向し、前記第一結合部材とで前記被締結部材を挟み込んで締結するために、前記被締結部材に当接する一方の平面部と、前記一方の平面部の中央と、前記一方の平面部と対向する他方の平面部の中央とを貫通して軸方向に形成された、前記第一結合部材の、前記被締結部材に形成された孔部を通過した雄ねじ部が入る中心孔と、前記一方の平面部には、軸方向に沿って、前記一方の平面部から前記他方の平面部に向かって形成され、前記一方の平面部に開口部が形成された溝部と、前記溝部には、前記溝部の形状に沿って、前記溝部内に組み込まれると、前記一方の平面部の前記開口部から***する弾性部材と、を備えることを特徴とする。   In order to achieve the above object, the invention according to claim 1 is directed to a first coupling member having a head and a male screw portion continuous with the head, via a fastened member, In order to sandwich and fasten the fastened member with one coupling member, the one flat portion that comes into contact with the fastened member, the center of the one flat portion, and the other flat surface that faces the one flat portion A center hole into which the male screw portion that has passed through the hole formed in the fastened member of the first coupling member is formed in an axial direction through the center of the portion, and the one plane portion includes A groove portion formed along the axial direction from the one flat surface portion toward the other flat surface portion and having an opening formed in the one flat surface portion; and the groove portion according to a shape of the groove portion. Then, when it is incorporated in the groove part, it protrudes from the opening part of the one flat part. Characterized in that it comprises a sexual member.

従って、請求項１に記載の発明によれば、本発明である緩み防止機構付き結合部材の、被締結部材に対向する一方の平面部に溝部が形成され、溝部には、溝部の形状に沿って、弾性部材が溝部内に組み込まれると、一方の平面部から弾性部材が***し（突出し）、緩み防止機構付き結合部材と第一結合部材（ボルト）とで被締結部材を挟み込むと、被締結部材に緩み防止機構付き結合部材の一方の平面部から***した（突出した）弾性部材が当接し、第一結合部材（ボルト）を螺合等することにより被締結部材の締結を行うと、緩み防止機構付き結合部材の一方の平面部から***した（突出した）弾性部材が溝部内に押し込められた（収納された）状態になり、弾性部材からの押圧が被締結部材に加わることが可能になる。   Therefore, according to the first aspect of the present invention, the groove portion is formed in one flat surface portion of the coupling member with the loosening prevention mechanism according to the present invention facing the member to be fastened, and the groove portion has a shape along the groove portion. When the elastic member is incorporated into the groove portion, the elastic member rises (projects) from one flat portion, and when the member to be fastened is sandwiched between the coupling member with a locking mechanism and the first coupling member (bolt), When the fastening member is fastened by screwing the first coupling member (bolt) with the elastic member raised (projected) from one flat surface portion of the coupling member with the loosening prevention mechanism in contact with the fastening member, The elastic member raised (projected) from one flat surface of the coupling member with the loosening prevention mechanism is pushed into (stored) in the groove, and the pressure from the elastic member can be applied to the fastened member. become.

また、請求項２に記載の発明は、請求項１に記載の構成に加え、前記中心孔には、前記第一結合部材の前記雄ねじ部と螺合する雌ねじ部が形成されており、前記中心孔の前記雌ねじ部と前記第一結合部材の前記雄ねじ部とが螺合することにより、前記一方の平面部の前記溝部に組み込まれた前記弾性部材が前記被締結部材に当接することを特徴とする。   According to a second aspect of the present invention, in addition to the configuration of the first aspect, the central hole is formed with a female screw portion that is screwed with the male screw portion of the first coupling member, and the center When the female screw portion of the hole and the male screw portion of the first coupling member are screwed together, the elastic member incorporated in the groove portion of the one flat surface portion comes into contact with the fastened member. To do.

従って、請求項２に記載の発明によれば、本発明である緩み防止機構付き結合部材の、被締結部材に対向する一方の平面部に溝部が形成され、溝部には、溝部の形状に沿って、弾性部材が溝部内に組み込まれると、一方の平面部から***し（突出し）、緩み防止機構付き結合部材（ナット）と第一結合部材（ボルト）とで被締結部材を挟み込むと、被締結部材に緩み防止機構付き結合部材の一方の平面部から***した（突出した）弾性部材が当接し、さらに第一結合部材（ボルト）と緩み防止機構付き結合部材（ナット）とを螺合することにより被締結部材の締結を行うと、緩み防止機構付き結合部材の一方の平面部から***した（突出した）弾性部材が溝部内に押し込められた（収納された）状態になり、弾性部材からの押圧が緩み防止機構付き結合部材（ナット）と第一結合部材（ボルト）の螺合部に加わり、緩み防止機構付き結合部材（ナット）と第一結合部材（ボルト）の螺合部の摩擦力を高めることが可能になる。   Therefore, according to the second aspect of the present invention, the groove portion is formed in one flat surface portion of the coupling member with the loosening prevention mechanism according to the present invention facing the member to be fastened, and the groove portion has a shape along the groove portion. When the elastic member is incorporated into the groove portion, the elastic member protrudes from one flat portion (projects), and when the member to be fastened is sandwiched between the coupling member (nut) with the loosening prevention mechanism and the first coupling member (bolt), An elastic member raised (projected) from one flat surface of the coupling member with the loosening prevention mechanism contacts the fastening member, and further the first coupling member (bolt) and the coupling member with the loosening prevention mechanism (nut) are screwed together. Thus, when the fastened member is fastened, the elastic member raised (projected) from one flat surface portion of the coupling member with the loosening prevention mechanism is pushed into (stored) in the groove portion, and the elastic member Prevents loosening of the machine It is possible to increase the frictional force of the threaded part of the coupling member (nut) with the loosening prevention mechanism and the first coupling member (bolt) by joining the threaded part of the coupling member (nut) and the first coupling member (bolt). become.

さらに、請求項３に記載の発明は、請求項１又は２に記載の構成に加え、前記溝部は、前記被締結部材に当接する前記一方の平面部に、前記中心孔と同心状に形成されていることを特徴とする。   Furthermore, in the invention described in claim 3, in addition to the structure described in claim 1 or 2, the groove portion is formed concentrically with the center hole in the one flat portion in contact with the fastened member. It is characterized by.

従って、請求項３に記載の発明によれば、溝部は、中心孔と同心状に形成されているので、溝部が形成された一方の平面部が被締結部材に当接すると、溝部内に組み込まれる弾性部材が被締結部材に均一に当接し、溝部が形成された平面部から均一な押圧を被締結部材側に加えることが可能になる。   Therefore, according to the third aspect of the present invention, since the groove is formed concentrically with the center hole, when the one flat surface formed with the groove contacts the member to be fastened, the groove is incorporated into the groove. The elastic member to be brought into contact with the member to be fastened uniformly makes it possible to apply a uniform pressure to the member to be fastened from the flat surface portion on which the groove is formed.

また、請求項４に記載の発明は、請求項１又は３に記載の構成に加え、前記溝部は、前記一方の平面部と反対側の前記他方の平面部にも形成されており、前記他方の平面部に形成された前記溝部は、軸方向に沿って、前記他方の平面部から前記一方の平面部に向かって形成され、前記他方の平面部に開口部が形成され、前記一方の平面部に形成された前記溝部と径が同一であることが含まれることを特徴とする。   According to a fourth aspect of the present invention, in addition to the configuration according to the first or third aspect, the groove portion is also formed in the other planar portion on the opposite side to the one planar portion, and the other The groove portion formed in the planar portion is formed from the other planar portion toward the one planar portion along the axial direction, an opening is formed in the other planar portion, and the one planar surface is formed. It is included that the diameter is the same as the said groove part formed in the part.

従って、請求項４に記載の発明によれば、第一結合部材とともに被締結部材を締結すると被締結部材に当接する一方の平面部と反対側の他方の平面部にも溝部が形成されているため、一方の平面部と同様に溝部に弾性部材を組み込むことが可能になり、また、他方の平面部に形成される溝部は一方の平面部の溝部の径と同一とすることも、或いは異なる径とすることも可能であり、第一結合部材と第二結合部材ともに被締結部材を挟み込んだ際に弾性部材が第一結合部材の雄ねじ部の周りを囲むことになり第一結合部材の雄ねじ部近傍への塵、埃等の侵入を防止することが可能になる。   Therefore, according to the fourth aspect of the present invention, when the fastened member is fastened together with the first coupling member, the groove portion is also formed in the other flat surface portion opposite to the flat surface portion that contacts the fastened member. Therefore, it is possible to incorporate an elastic member into the groove portion as in the case of the one flat portion, and the groove portion formed in the other flat portion may be the same as or different from the diameter of the groove portion of the one flat portion. The elastic member surrounds the male threaded portion of the first coupling member when the fastened member is sandwiched between the first coupling member and the second coupling member, and the male thread of the first coupling member It becomes possible to prevent intrusion of dust, dust, etc. near the portion.

さらに、請求項５に記載の発明は、請求項４に記載の構成に加え、前記他方の平面部に形成された前記溝部には、前記溝部の形状に沿って、前記溝部内に組み込まれると、前記他方の平面部の前記開口部から***する弾性部材と、を備えることを特徴とする。   Furthermore, in the invention according to claim 5, in addition to the configuration according to claim 4, the groove formed in the other plane portion is incorporated in the groove along the shape of the groove. And an elastic member protruding from the opening of the other plane part.

従って、請求項５に記載の発明によれば、他方の平面部に形成された溝部にも弾性部材が組み込まれるため、被締結部材を締結すると、一方の平面部の溝部の弾性部材から押圧だけではなく、他方の平面部の溝部の弾性部材からの押圧も生じることになり、被締結部材側への加わる押圧を大きくすることが可能になる。   Therefore, according to the invention described in claim 5, since the elastic member is also incorporated into the groove portion formed in the other flat portion, when the fastened member is fastened, only the pressing from the elastic member of the groove portion of the one flat portion is performed. Instead, pressing from the elastic member of the groove portion of the other planar portion also occurs, and it is possible to increase the pressing applied to the fastened member side.

また、請求項６に記載の発明は、請求項５に記載の構成に加え、前記第一結合部材と前記被締結部材に対向し、前記被締結部材と第二結合部材とに挟み込まれ、前記第一結合部材と前記第二結合部材とにより前記被締結部材を締結すると、前記一方の平面部の前記溝部に組み込まれた前記弾性部材が前記被締結部材に当接し、前記他方の平面部の前記溝部に組み込まれた前記弾性部材が前記第二結合部材に当接することを特徴とする。   Moreover, in addition to the structure of Claim 5, invention of Claim 6 opposes said 1st coupling member and said to-be-fastened member, and is inserted | pinched between said to-be-fastened member and 2nd coupling member, When the fastened member is fastened by the first joint member and the second joint member, the elastic member incorporated in the groove portion of the one flat portion comes into contact with the fastened member, and the other flat portion The elastic member incorporated in the groove is in contact with the second coupling member.

従って、請求項６に記載の発明によれば、本発明である緩み防止機構付き結合部材の、被締結部材に対向する一方の平面部に溝部が形成され、第二結合部材に対向する他方の平面部にも溝部が形成され、それぞれの溝部は、溝部の形状に沿って、弾性部材が溝部内に組み込まれると、それぞれの平面部から弾性部材が***し（突出し）、第一結合部材（ボルト）と第二結合部材（ナット）とで緩み防止機構付き結合部材（座金）と被締結部材とを挟み込むと、被締結部材に緩み防止機構付き結合部材（座金）の一方の平面部から***した（突出した）弾性部材が当接し、第二結合部材（ナット）の平面部（底面部）に緩み防止機構付き結合部材（座金）の他方の平面部から***した（突出した）弾性部材が当接し、第一結合部材（ボルト）と緩み防止機構付き結合部材（ナット）とを螺合することにより被締結部材の締結を行うと、緩み防止機構付き結合部材のそれぞれの平面部から***した（突出した）弾性部材が溝部内に押し込められた（収納された）状態になり、弾性部材からの押圧が第一結合部材（ボルト）と第二結合部材（ナット）の螺合部に加わり、第一結合部材（ボルト）と第二結合部材（ナット）の螺合部の摩擦力が高まることが可能になる。   Therefore, according to the invention described in claim 6, the groove portion is formed in the one flat surface portion facing the fastened member of the coupling member with the loosening prevention mechanism according to the present invention, and the other facing the second coupling member. A groove portion is also formed in the flat surface portion. When the elastic member is incorporated in the groove portion along the shape of the groove portion, the elastic member rises (projects) from each flat surface portion, and the first coupling member ( When the coupling member with a loosening prevention mechanism (washer) and the fastening member are sandwiched between the bolt and the second coupling member (nut), the coupling member rises from one flat portion of the coupling member with the loosening prevention mechanism (washer). The elastic member that protrudes (projects) comes into contact with the flat surface portion (bottom surface portion) of the second coupling member (nut) and rises (projects) from the other flat surface portion of the coupling member (washer) with a loosening prevention mechanism. Abut the first coupling member (bolt) When the fastening member is fastened by screwing with a coupling member with a locking mechanism (nut), the elastic member raised (projected) from each flat surface of the coupling member with a locking mechanism is pushed into the groove Pressed (stored), the pressure from the elastic member is applied to the threaded portion of the first coupling member (bolt) and the second coupling member (nut), and the first coupling member (bolt) and the second coupling The frictional force of the threaded portion of the member (nut) can be increased.

さらに、請求項７に記載の発明は、請求項１乃至６いずれかに記載の構成に加え、前記溝部は、軸方向に沿って形成された、対向する側壁部と、対向する前記側壁部と連続して、前記側壁部と交差する方向に形成された底面部とからなり、前記底面部と対向する側である前記平面部側には前記開口部が形成され、対向する前記側壁部の内、外周側の前記側壁部の、前記開口部側の先端側が前記中心孔側の前記側壁部側に伸びる伸長部が形成されていることを特徴とする。   Furthermore, in addition to the structure in any one of Claims 1 thru | or 6, the invention of Claim 7 has the said side wall part formed in the axial direction, and the said side wall part which opposes the said groove part. The opening portion is formed on the side of the flat surface portion, which is a side facing the bottom surface portion, and includes a bottom surface portion formed in a direction intersecting with the side wall portion. An extension portion is formed in which the distal end side of the opening portion side of the side wall portion on the outer peripheral side extends to the side wall portion side on the center hole side.

従って、請求項７に記載の発明によれば、溝部は、対向する側壁部と、対向する側壁部と連続して形成された底面部とからなり、一方の側壁部（緩み防止機構付き結合部材（座金、或いはナット）の外周側の側壁部）の、開口部側の先端側に、他方の側壁部（中心孔側の側壁部）側に伸びる伸長部が形成されることで、溝部内での弾性部材の組み込みを可能にしている。   Therefore, according to the seventh aspect of the present invention, the groove portion includes an opposing side wall portion and a bottom surface portion formed continuously with the opposing side wall portion, and one side wall portion (a coupling member with a loosening prevention mechanism). In the groove portion, an extension portion extending to the other side wall portion (side wall portion on the center hole side) is formed on the tip side on the opening side of the (side wall portion on the outer periphery side of the washer or nut). It is possible to incorporate an elastic member.

また、請求項８に記載の発明は、請求項７に記載の構成に加え、前記溝部に前記弾性部材を組み込むと、前記外周側の前記側壁部に形成された前記伸長部の端縁部が前記弾性部材に当接し、前記弾性部材は前記溝部で保持され、前記弾性部材は前記平面部より***することを特徴とする。   Moreover, in addition to the structure of Claim 7, when the invention of Claim 8 incorporates the said elastic member in the said groove part, the edge part of the said extending | stretching part formed in the said side wall part on the said outer peripheral side becomes The elastic member abuts on the elastic member, the elastic member is held by the groove portion, and the elastic member protrudes from the flat portion.

従って、請求項８に記載の発明によれば、溝部に、溝部の形状に沿って弾性部材である、例えば、コイルスプリングを組み込むと、コイルスプリングの側面部が溝部の側壁部、底面部に接触し、緩み防止機構付き結合部材（座金、或いはナット）の外周側の側壁部に形成された伸長部の端縁部がコイルスプリングの側面部に当接することでコイルスプリングが溝部内で保持されることが可能になり、コイルスプリングは溝部より突出し、コイルスプリングは平面部より***するため、被締結部材を第一結合部材等と締結する際にコイルスプリングによる押圧が第一結合部材等に加わることが可能になる。   Therefore, according to the eighth aspect of the present invention, when a coil spring, for example, an elastic member is incorporated in the groove portion along the shape of the groove portion, the side surface portion of the coil spring contacts the side wall portion and the bottom surface portion of the groove portion. In addition, the coil spring is held in the groove portion by the end edge portion of the elongated portion formed on the side wall portion on the outer peripheral side of the coupling member (washer or nut) with a loosening prevention mechanism coming into contact with the side surface portion of the coil spring. Since the coil spring protrudes from the groove and the coil spring rises from the flat surface, when the member to be fastened is fastened to the first coupling member or the like, pressure from the coil spring is applied to the first coupling member or the like. Is possible.

本発明によれば、緩み防止機構付き結合部材であるナットの、被締結部材に対向する、平面部に形成された溝部に弾性部材を組み込むことで、弾性部材を平面部から***させ、***させた状態で第一結合部材（ボルト）とで被締結部材を挟み込んで螺合により締結すると、この緩み防止機構付き結合部材である緩み防止機構付きナットの締結（取り付け）と同時に緩み防止作用を発揮することができる。つまり、緩み防止機構付き結合部材（ナット）の平面部の溝部に組み込まれた弾性部材の平面部から***した部分が被締結部材に当接し、弾性部材の***した部分が溝部内に入り込み（収納され）、弾性部材からの押圧により、被締結部材側に押圧が加わるとともに、第一結合部材（ボルト）と螺合している緩み防止機構付き結合部材（ナット）側にも押圧が加わり、第一結合部材（ボルト）と緩み防止機構付き結合部材（ナット）との螺合部に押圧が加わることで第一結合部材（ボルト）と緩み防止機構付き結合部材（ナット）との螺合部の摩擦力が高まり、第一結合部材（ボルト）と緩み防止機構付き結合部材（ナット）との緩みを防止し、被締結部材同士の緩みのない状態での締結を維持し易くできる。   According to the present invention, the elastic member is raised from the flat surface portion by assembling the elastic member into the groove portion formed in the flat surface portion of the nut, which is the coupling member with the loosening prevention mechanism, facing the fastened member. When the clamped member is clamped with the first coupling member (bolt) in this state and fastened by screwing, the loosening prevention mechanism, which is a coupling member with a loosening prevention mechanism, is tightened (attached) and at the same time exhibits a loosening prevention effect. can do. In other words, the protruding portion of the elastic member built in the groove portion of the flat portion of the coupling member (nut) with a loosening prevention mechanism comes into contact with the fastened member, and the protruding portion of the elastic member enters the groove portion (accommodates). The pressure is applied to the fastened member side by the pressure from the elastic member, and the pressure is also applied to the coupling member (nut) with a loosening prevention mechanism screwed to the first coupling member (bolt). By applying pressure to the threaded portion between the one coupling member (bolt) and the coupling member (nut) with the loosening prevention mechanism, the screwing portion between the first coupling member (bolt) and the coupling member (nut with the loosening prevention mechanism) The frictional force is increased, and it is possible to prevent loosening between the first coupling member (bolt) and the coupling member (nut) with a loosening prevention mechanism, and to easily maintain the fastening in a state where the fastened members are not loosened.

また、緩み防止機構付き結合部材が座金である場合、緩み防止機構付き結合部材（座金）を第二結合部材（ナット）と被締結部材との間に挟み込み、第一結合部材（ボルト）ともに第二結合部材（ナット）により被締結部材を締結すると、この緩み防止機構付き結合部材である緩み防止機構付き座金の締結（取り付け）と同時に緩み防止作用を発揮することができる。つまり、緩み防止機構付き結合部材の、一方の平面部の溝部に組み込まれた弾性部材の一方の平面部から***した部分が被締結部材に当接し、他方の平面部の溝部に組み込まれた弾性部材の他方の平面部から***した部分が第二結合部材（ナット）に当接するため、緩み防止機構付き結合部材（座金）から被締結部材側へ押圧が加わるとともに、緩み防止機構付き結合部材（座金）から第二結合部材（ナット）側へ押圧が加わり、第一結合部材（ボルト）と第二結合部材（ナット）との螺合部に押圧が加わることで第一結合部材（ボルト）と第二結合部材（ナット）との螺合部の摩擦力が高まり、第一結合部材（ボルト）と第二結合部材（ナット）との緩みを防止し、被締結部材同士の緩みのない状態での締結を維持し易くできる。   Further, when the coupling member with the loosening prevention mechanism is a washer, the coupling member with the loosening prevention mechanism (washer) is sandwiched between the second coupling member (nut) and the member to be fastened, and the first coupling member (bolt) is the first. When the member to be fastened is fastened by the two coupling members (nuts), the loosening prevention action can be exhibited simultaneously with the fastening (attachment) of the washer with the loosening prevention mechanism which is the coupling member with the loosening prevention mechanism. That is, a portion of the coupling member with a loosening prevention mechanism that protrudes from one flat surface portion of the elastic member incorporated in the groove portion of one flat surface portion abuts on the fastened member and is elastic in the groove portion of the other flat surface portion. Since the portion raised from the other flat portion of the member abuts on the second coupling member (nut), pressure is applied from the coupling member with a loosening prevention mechanism (washer) to the fastening member side, and the coupling member with the loosening prevention mechanism ( The pressure is applied from the washer) to the second coupling member (nut) side, and the first coupling member (bolt) is pressed by applying pressure to the threaded portion between the first coupling member (bolt) and the second coupling member (nut). The frictional force of the screwed portion with the second coupling member (nut) is increased, and the first coupling member (bolt) and the second coupling member (nut) are prevented from loosening, and the fastened members are not loosened. Can be easily maintained.

本発明の緩み防止機構付き結合部材であるナットを示す説明図である。（ａ）は、本発明の緩み防止機構付き結合部材であるナットの、溝部が設けられた平面部側を示す説明図である。（ｂ）は、本発明の緩み防止機構付き結合部材であるナットの平面部に設けられた溝部に組み込まれる弾性部材であるコイルスプリングの説明図である。（ｃ）は、（ａ）に示すナットの平面部に設けられた溝部に（ｂ）に示すコイルスプリングを組み込んだ状態を示す説明図である。It is explanatory drawing which shows the nut which is a coupling member with a loosening prevention mechanism of this invention. (A) is explanatory drawing which shows the plane part side in which the groove part was provided of the nut which is a coupling member with a loosening prevention mechanism of this invention. (B) is explanatory drawing of the coil spring which is an elastic member integrated in the groove part provided in the plane part of the nut which is a coupling member with the loosening prevention mechanism of this invention. (C) is explanatory drawing which shows the state which incorporated the coil spring shown in (b) in the groove part provided in the plane part of the nut shown in (a). 図１に示すナットの平面部に設けられた溝部の位置を示す説明図である。It is explanatory drawing which shows the position of the groove part provided in the plane part of the nut shown in FIG. 図１に示すナットの平面部に設けられた溝部の、図１のＡ−Ａ線に沿うナットの軸方向の断面形状及びその溝部にコイルスプリングを組み込んだ状態を示す説明図である。It is explanatory drawing which shows the cross-sectional shape of the axial direction of the nut which follows the AA line of FIG. 1, and the state which incorporated the coil spring in the groove part provided in the plane part of the nut shown in FIG. 図１に示すナットと第一結合部材（ボルト）とで被締結部材を挟み込む状態を示す説明図である。（ａ）は、図１に示すナットと第一結合部材（ボルト）とで被締結部材を挟み込み、図１に示すナットの溝部に組み込んだコイルスプリングが被締結部材に当接する前の状態を示す説明図である。（ｂ）は、（ａ）の際の溝部内のコイルスプリングの状態を示す説明図である。It is explanatory drawing which shows the state which clamps a to-be-fastened member with the nut shown in FIG. 1, and a 1st coupling member (bolt). (A) shows the state before the member to be fastened is sandwiched between the nut shown in FIG. 1 and the first coupling member (bolt) and the coil spring incorporated in the groove of the nut shown in FIG. 1 contacts the member to be fastened. It is explanatory drawing. (B) is explanatory drawing which shows the state of the coil spring in the groove part in the case of (a). 図１に示すナットと第一結合部材（ボルト）とで被締結部材を挟み込んだ状態を示す説明図である。（ａ）は、図１に示すナットと第一結合部材（ボルト）とで被締結部材を挟み込み、図１に示すナットの溝部に組み込んだコイルスプリングが被締結部材に当接した状態を示す説明図である。（ｂ）は、（ａ）の際の溝部内のコイルスプリングの状態を示す説明図である。It is explanatory drawing which shows the state which pinched | fastened the to-be-fastened member with the nut shown in FIG. 1, and a 1st coupling member (bolt). (A) is an explanation showing a state in which the member to be fastened is sandwiched between the nut shown in FIG. 1 and the first coupling member (bolt), and the coil spring built in the groove of the nut shown in FIG. 1 is in contact with the member to be fastened. FIG. (B) is explanatory drawing which shows the state of the coil spring in the groove part in the case of (a). 図１に示すナットと第一結合部材（ボルト）とで被締結部材を締結した状態を示す説明図である。（ａ）は、図１に示すナットと第一結合部材（ボルト）とで被締結部材を挟み込み、図１に示すナットの平面部が被締結部材に当接した状態を示す説明図である。（ｂ）は、（ａ）の際の溝部内のコイルスプリングの状態を示す説明図である。It is explanatory drawing which shows the state which fastened the to-be-fastened member with the nut shown in FIG. 1, and a 1st coupling member (bolt). (A) is explanatory drawing which shows the state which pinched | interposed the to-be-fastened member between the nut shown in FIG. 1, and a 1st coupling member (bolt), and the plane part of the nut shown in FIG. (B) is explanatory drawing which shows the state of the coil spring in the groove part in the case of (a). 本発明の緩み防止機構付き結合部材である座金を示す説明図である。（ａ）は、本発明の緩み防止機構付き結合部材である座金の、溝部が設けられた一方の平面部側を示す説明図である。（ｂ）は、本発明の緩み防止機構付き結合部材である座金の、溝部が設けられた他方の平面部側を示す説明図である。It is explanatory drawing which shows the washer which is a coupling member with a loosening prevention mechanism of this invention. (A) is explanatory drawing which shows the one plane part side in which the groove part was provided of the washer which is a coupling member with the loosening prevention mechanism of this invention. (B) is explanatory drawing which shows the other plane part side in which the groove part was provided of the washer which is a coupling member with a loosening prevention mechanism of this invention. 図７（ａ）のＡ−Ａ線に沿う座金の、軸方向の断面を示す説明図である。（ａ）は、一方の平面部側に設けられた溝部と他方の平面部側に設けられた溝部との位置関係を示す説明図である。（ｂ）は、それぞれの溝部にコイルスプリングを組み込んだ状態を示す説明図である。（ｃ）は、コイルスプリングを組み込んだ溝部の詳細を示す説明図である。It is explanatory drawing which shows the cross section of the axial direction of the washer in alignment with the AA line of Fig.7 (a). (A) is explanatory drawing which shows the positional relationship of the groove part provided in the one plane part side, and the groove part provided in the other plane part side. (B) is explanatory drawing which shows the state which incorporated the coil spring in each groove part. (C) is explanatory drawing which shows the detail of the groove part incorporating the coil spring. 本発明の緩み防止機構付き結合部材である座金へのコイルスプリングの組み込みを示す説明図である。（ａ）は、一方の平面部側の溝部へのコイルスプリングの組み込みを示す説明図である。（ｂ）は、他方の平面部側の溝部へのコイルスプリングの組み込みを示す説明図である。It is explanatory drawing which shows the incorporation of the coil spring to the washer which is a coupling member with a loosening prevention mechanism of this invention. (A) is explanatory drawing which shows incorporation of the coil spring to the groove part by the side of one plane part. (B) is explanatory drawing which shows incorporation of the coil spring to the groove part by the side of the other plane part. コイルスプリングを組み込んだ図７に示す座金と第一結合部材（ボルト）及び第二結合部材（ナット）とで被締結部材を挟み込む状態を示す説明図である。（ａ）は、コイルスプリングを組み込んだ図７に示す座金と第一結合部材（ボルト）及び第二結合部材（ナット）とで被締結部材を挟み込む状態を示す説明図である。（ｂ）は、（ａ）の際の溝部内のコイルスプリングの状態を示す説明図である。It is explanatory drawing which shows the state which clamps a to-be-fastened member with the washer shown in FIG. 7 incorporating a coil spring, a 1st coupling member (bolt), and a 2nd coupling member (nut). (A) is explanatory drawing which shows the state which clamps a to-be-fastened member with the washer shown in FIG. 7 incorporating a coil spring, a 1st coupling member (bolt), and a 2nd coupling member (nut). (B) is explanatory drawing which shows the state of the coil spring in the groove part in the case of (a). コイルスプリングを組み込んだ図７に示す座金と第一結合部材（ボルト）及び第二結合部材（ナット）とで被締結部材を挟み込んだ状態を示す説明図である。（ａ）は、コイルスプリングを組み込んだ図７に示す座金と第一結合部材（ボルト）及び第二結合部材（ナット）とで被締結部材を挟み込み、コイルスプリングを組み込んだ図７に示す座金の溝部に組み込んだコイルスプリングが被締結部材に当接した状態を示す説明図である。（ｂ）は、（ａ）の際の溝部内のコイルスプリングの状態を示す説明図である。It is explanatory drawing which shows the state which clamped the to-be-fastened member with the washer shown in FIG. 7 incorporating a coil spring, the 1st coupling member (bolt), and the 2nd coupling member (nut). FIG. 7A shows a structure of the washer shown in FIG. 7 in which the member to be fastened is sandwiched between the washer shown in FIG. 7 incorporating the coil spring, the first coupling member (bolt), and the second coupling member (nut), and the coil spring is incorporated. It is explanatory drawing which shows the state which the coil spring integrated in the groove part contact | abutted to the to-be-fastened member. (B) is explanatory drawing which shows the state of the coil spring in the groove part in the case of (a). コイルスプリングを組み込んだ図７に示す座金と第一結合部材（ボルト）及び第二結合部材（ナット）とで被締結部材を締結した状態を示す説明図である。（ａ）は、コイルスプリングを組み込んだ図７に示す座金と第一結合部材（ボルト）及び第二結合部材（ナット）とで被締結部材を挟み込み、コイルスプリングを組み込んだ図７に示す座金の平面部が被締結部材に当接した状態を示す説明図である。（ｂ）は、（ａ）の際の溝部内のコイルスプリングの状態を示す説明図である。It is explanatory drawing which shows the state which fastened the to-be-fastened member with the washer shown in FIG. 7 incorporating a coil spring, the 1st coupling member (bolt), and the 2nd coupling member (nut). FIG. 7A shows a structure of the washer shown in FIG. 7 in which the member to be fastened is sandwiched between the washer shown in FIG. 7 incorporating the coil spring, the first coupling member (bolt), and the second coupling member (nut), and the coil spring is incorporated. It is explanatory drawing which shows the state which the plane part contact | abutted to the to-be-fastened member. (B) is explanatory drawing which shows the state of the coil spring in the groove part in the case of (a). 本発明の緩み防止機構付き結合部材である別の形態の座金を示す説明図である。（ａ）は、本発明の緩み防止機構付き結合部材である別の形態の座金の、溝部が設けられた一方の平面部側を示す説明図である。（ｂ）は、本発明の緩み防止機構付き結合部材である別の形態の座金の、溝部が設けられた他方の平面部側を示す説明図である。It is explanatory drawing which shows the washer of another form which is a coupling member with a loosening prevention mechanism of this invention. (A) is explanatory drawing which shows the one plane part side in which the groove part was provided of the washer of another form which is a coupling member with a loosening prevention mechanism of this invention. (B) is explanatory drawing which shows the other plane part side in which the groove part was provided of the washer of another form which is a coupling member with a loosening prevention mechanism of this invention. 図１３（ａ）のＡ−Ａ線に沿う座金の、軸方向の断面を示す説明図である。（ａ）は、一方の平面部側に設けられた溝部と他方の平面部側に設けられた溝部との位置関係を示す説明図である。（ｂ）は、それぞれの溝部にコイルスプリングを組み込んだ状態を示す説明図である。（ｃ）は、コイルスプリングを組み込んだ溝部の詳細を示す説明図である。It is explanatory drawing which shows the cross section of the axial direction of the washer in alignment with the AA line of Fig.13 (a). (A) is explanatory drawing which shows the positional relationship of the groove part provided in the one plane part side, and the groove part provided in the other plane part side. (B) is explanatory drawing which shows the state which incorporated the coil spring in each groove part. (C) is explanatory drawing which shows the detail of the groove part incorporating the coil spring. 本発明の緩み防止機構付き結合部材である別の形態の座金の平面部側の溝部へのコイルスプリングの組み込みを示す説明図である。It is explanatory drawing which shows the assembly of the coil spring to the groove part by the side of the plane part of the washer of another form which is a coupling member with a loosening prevention mechanism of this invention. コイルスプリングを組み込んだ図１３に示す座金と第一結合部材（ボルト）及び第二結合部材（ナット）とで被締結部材を挟み込んだ状態を示す説明図である。（ａ）は、コイルスプリングを組み込んだ図１３に示す座金と第一結合部材（ボルト）及び第二結合部材（ナット）とで被締結部材を挟み込み、図１３に示す座金の溝部に組み込んだコイルスプリングが被締結部材に当接した状態を示す説明図である。（ｂ）は、（ａ）の際の溝部内のコイルスプリングの状態を示す説明図である。It is explanatory drawing which shows the state which clamped the to-be-fastened member with the washer shown in FIG. 13 incorporating a coil spring, the 1st coupling member (bolt), and the 2nd coupling member (nut). FIG. 13A shows a coil in which a member to be fastened is sandwiched between a washer shown in FIG. 13 incorporating a coil spring, a first coupling member (bolt), and a second coupling member (nut) and incorporated in the groove of the washer shown in FIG. It is explanatory drawing which shows the state which the spring contact | abutted to the to-be-fastened member. (B) is explanatory drawing which shows the state of the coil spring in the groove part in the case of (a). コイルスプリングを組み込んだ図１３に示す座金と第一結合部材（ボルト）及び第二結合部材（ナット）とで被締結部材を締結した状態を示す説明図である。（ａ）は、コイルスプリングを組み込んだ図１３に示す座金と第一結合部材（ボルト）及び第二結合部材（ナット）とで被締結部材を挟み込み、コイルスプリングを組み込んだ図１３に示す座金の平面部が被締結部材に当接した状態を示す説明図である。（ｂ）は、（ａ）の際の溝部内のコイルスプリングの状態を示す説明図である。It is explanatory drawing which shows the state which fastened the to-be-fastened member with the washer shown in FIG. 13 incorporating a coil spring, the 1st coupling member (bolt), and the 2nd coupling member (nut). FIG. 13A is a cross-sectional view of the washer shown in FIG. 13 in which the member to be fastened is sandwiched between the washer shown in FIG. 13 incorporating the coil spring, the first connecting member (bolt), and the second connecting member (nut). It is explanatory drawing which shows the state which the plane part contact | abutted to the to-be-fastened member. (B) is explanatory drawing which shows the state of the coil spring in the groove part in the case of (a). 特許文献１に記載の、緩解防止具の断面図である。It is sectional drawing of the remission prevention tool of patent document 1. 特許文献２に記載の、緩み止め座金を用いてボルト・ナットを螺合した状態を示す要部断面図である。It is principal part sectional drawing which shows the state which screwed the volt | bolt and the nut using the locking stopper washer of patent document 2. As shown in FIG.

以下、本発明を実施するための形態について図面を参照して説明する。   Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

（例１）
本発明である緩み防止機構付き結合部材であるナット１が図１に示されている。ナット１は、図１（ａ）に示すように、略円柱状である六角柱の形状をなしており、ナット１の軸方向に沿って、一方の平面部である下面部１２の中央から他方の平面部である上面部１１の中央に孔部（中心孔）１３が形成されている。中心孔１３には雌ねじ部がナット１の軸方向に沿って形成されている。中心孔１３の径は、本例では１０ｍｍとしているが、特に１０ｍｍに限定されることなく８ｍｍ、１２ｍｍ等とすることも可能である。また、本例では、平面部である上面部１１（及び下面部１２）の大きさである上面部１１（及び下面部１２）の対角線上に対向する頂点１６、１６間の距離が３０ｍｍ程度となっているが、特に３０ｍｍに限定されるものではない。さらに、本例でのナット１の厚みである、ナット１の軸方向に沿う、上面部１１から下面部１２の長さは２０ｍｍとしているが、２０ｍｍより厚くすることも可能であり、薄くすることも可能である。 (Example 1)
A nut 1 which is a coupling member with a loosening prevention mechanism according to the present invention is shown in FIG. As shown in FIG. 1A, the nut 1 has a substantially cylindrical hexagonal column shape, and extends along the axial direction of the nut 1 from the center of the lower surface portion 12, which is one flat surface portion. A hole (center hole) 13 is formed at the center of the upper surface portion 11 which is a flat surface portion. A female screw portion is formed in the center hole 13 along the axial direction of the nut 1. The diameter of the center hole 13 is 10 mm in this example, but is not particularly limited to 10 mm, and may be 8 mm, 12 mm, or the like. In this example, the distance between the vertices 16 and 16 facing the diagonal line of the upper surface portion 11 (and the lower surface portion 12), which is the size of the upper surface portion 11 (and the lower surface portion 12), which is a plane portion, is about 30 mm. However, it is not particularly limited to 30 mm. Furthermore, the length of the nut 1 in this example, which is 20 mm long from the upper surface portion 11 to the lower surface portion 12 along the axial direction of the nut 1, can be made thicker than 20 mm. Is also possible.

ナット１の、平面部である下面部１２には、図１（ａ）に示すように、中心孔１３と同心状の溝部１４が形成されている。溝部１４は、中心孔１３と外周１９との間に形成されており、本例では、図２に示すように、中心孔１３の外周１３１から溝部１４の側壁部１７まで長さＬ１と頂点１６から溝部１４の側壁部１８までの長さＬ２が同じになるように溝部１４を設けている。ただし、Ｌ１よりＬ２を長くしたり、Ｌ２よりＬ１を長くして溝部１４を設けることも可能である。本例では、図２に示すように、中心孔１３から頂点１６までの最短距離（直線Ａ）の長さと幅との比は１／６となるように設定することで２ｍｍとしている。ただし、幅Ｗについても本例の２ｍｍに限定されることなく２ｍｍより広くすることも可能であり、２ｍｍより狭くすることも可能である。また、本例では、溝部１４は、図１に示すように円で形成されているが、円に近い円弧の形状をとることも可能である。また、本例の円で形成された溝部１４の、下面部１２に形成された溝部１４の幅Ｗは均一になっている。   As shown in FIG. 1A, a groove portion 14 concentric with the center hole 13 is formed in the lower surface portion 12 which is a flat portion of the nut 1. The groove portion 14 is formed between the center hole 13 and the outer periphery 19. In this example, as shown in FIG. 2, the length L 1 and the apex 16 from the outer periphery 131 of the center hole 13 to the side wall portion 17 of the groove portion 14. The groove portion 14 is provided so that the length L2 from the groove portion 14 to the side wall portion 18 is the same. However, it is possible to provide the groove portion 14 by making L2 longer than L1 or by making L1 longer than L2. In this example, as shown in FIG. 2, the ratio between the length and the width of the shortest distance (straight line A) from the center hole 13 to the apex 16 is set to 1/6 to be 2 mm. However, the width W is not limited to 2 mm in this example, but can be wider than 2 mm, and can be narrower than 2 mm. Further, in this example, the groove portion 14 is formed in a circle as shown in FIG. 1, but it is also possible to take an arc shape close to the circle. Moreover, the width W of the groove part 14 formed in the lower surface part 12 of the groove part 14 formed of the circle of this example is uniform.

また、図３に示すように、溝部１４の、ナット１の軸方向の断面は矩形形状に近い形状で形成されている。溝部１４の、中心孔１３側に形成された側壁部１７はナット１の下面部１２から垂直にナット１の上面部１１に向かって（ナット１の軸方向に沿って）形成されている。本例では、側壁部１７はナット１の下面部１２からナット１の軸方向に沿って長さ（深さ）を５ｍｍ程度としている。基本的には、側壁部１７は幅Ｗより若干長く形成されている。そして、側壁部１７の、ナット１の下面部１２側の端縁部１７１と反対側の端縁部１５１から端縁部１５２までの、溝部１４の底面部１５はナット１の下面部１２（及び上面部１１）と平行に形成されており、幅Ｗより長く形成されている。   Moreover, as shown in FIG. 3, the cross section of the axial direction of the nut 1 of the groove part 14 is formed in the shape close | similar to a rectangular shape. A side wall portion 17 formed on the center hole 13 side of the groove portion 14 is formed vertically from the lower surface portion 12 of the nut 1 toward the upper surface portion 11 of the nut 1 (along the axial direction of the nut 1). In this example, the side wall portion 17 has a length (depth) of about 5 mm along the axial direction of the nut 1 from the lower surface portion 12 of the nut 1. Basically, the side wall portion 17 is formed slightly longer than the width W. The bottom surface portion 15 of the groove portion 14 from the end edge portion 151 to the end edge portion 152 on the side opposite to the end edge portion 171 on the side of the lower surface portion 12 of the nut 1 is the bottom surface portion 15 of the nut 1 (and It is formed in parallel with the upper surface part 11) and longer than the width W.

そして、底面部１５の端縁部１５２からは外周１９側の側壁部１８が形成されている。側壁部１８は、図３に示すように、側壁部１７と平行に（上面部１１及び下面部１２に対して垂直に）下面部１２側に向かって形成されている。側壁部１８側の下面部１２近傍では、円弧部１８１が形成されており、円弧部１８１に沿って側壁部１８側の下面部１２近傍が側壁部１７に向かって伸びている。つまり、図３に示すように、側壁部１８の下面部１２近傍が側壁部１８から連続する伸長部１８２となり、伸長部１８２が側壁部１７に向かって突出し、伸長部１８２の端縁部（端面）１８３が側壁部１７に対向している。そのため、溝部１４の開口部１４１のＷ方向の長さは底面部１５のＷ方向の長さより短くなっている。   A side wall 18 on the outer periphery 19 side is formed from the edge 152 of the bottom surface 15. As shown in FIG. 3, the side wall portion 18 is formed in parallel to the side wall portion 17 (perpendicular to the upper surface portion 11 and the lower surface portion 12) toward the lower surface portion 12 side. An arc portion 181 is formed in the vicinity of the lower surface portion 12 on the side wall portion 18 side, and the vicinity of the lower surface portion 12 on the side wall portion 18 side extends toward the side wall portion 17 along the arc portion 181. That is, as shown in FIG. 3, the vicinity of the lower surface portion 12 of the side wall portion 18 becomes an extended portion 182 continuous from the side wall portion 18, the extended portion 182 protrudes toward the side wall portion 17, and the end edge portion (end surface) of the extended portion 182 183 is opposed to the side wall portion 17. Therefore, the length in the W direction of the opening 141 of the groove portion 14 is shorter than the length in the W direction of the bottom surface portion 15.

この溝部１４内には、弾性部材２が組み込まれることになる。本例では、弾性部材２としてコイルスプリング２を溝部１４に組み込んでいる。具体的には、図１（ｂ）に示すように、弾性部材２であるコイルスプリング２の端部２２、２３同士を接近させてコイルスプリング２をリング形状にしてナット１の下面部１２に形成された溝部１４に沿うように組み込んでいる（図１（ｃ）参照）。コイルスプリング２が溝部１４に組み込まれると、図３に示すように、コイルスプリング２の側面側２１は側壁部１７及び底面部１５に接触し、コイルスプリング２の側壁部１８側は、側壁部１８側へ張り出し、伸長部１８２の端縁部（端面）１８３よりも側壁部１８側へ接近し、側壁部１８側の伸長部１８２の端縁部（端面）１８３にコイルスプリング２の側面側２１が当接することになる。その結果、コイルスプリング２は溝部１４内に保持されることになり、ナット１の下面部１２よりコイルスプリング２の側面部２１の一部が***する（突出する）ことになる。   The elastic member 2 is incorporated in the groove portion 14. In this example, the coil spring 2 is incorporated in the groove portion 14 as the elastic member 2. Specifically, as shown in FIG. 1B, the end portions 22 and 23 of the coil spring 2 that is the elastic member 2 are brought close to each other to form the coil spring 2 in a ring shape and formed on the lower surface portion 12 of the nut 1. It is incorporated along the groove 14 formed (see FIG. 1C). When the coil spring 2 is assembled in the groove portion 14, as shown in FIG. 3, the side surface 21 of the coil spring 2 contacts the side wall portion 17 and the bottom surface portion 15, and the side wall portion 18 side of the coil spring 2 is the side wall portion 18. The side surface 21 of the coil spring 2 is projected to the side edge 18 side of the extending portion 182 on the side wall 18 side, closer to the side wall portion 18 side than the end edge portion (end surface) 183 of the extending portion 182. It will abut. As a result, the coil spring 2 is held in the groove portion 14, and a part of the side surface portion 21 of the coil spring 2 rises (projects) from the lower surface portion 12 of the nut 1.

以上が本発明である緩み防止機構付き結合部材であるナット１の構造であり、つぎにこのナット１を用いての被締結部材３、４の締結について説明する。   The above is the structure of the nut 1 that is the coupling member with the loosening prevention mechanism according to the present invention. Next, the fastening of the fastened members 3 and 4 using the nut 1 will be described.

図４に示すように、板状の被締結部材３、４を重ね合わせて締結するために、被締結部材３、４に予め設けられた、図示しない孔部が重なり合うようにして被締結部材３、４を重ね合わせて図示しない孔部にボルト６の雄ねじ部６２を通す。そして、図４（ａ）に示すように、第一結合部材であるボルト６の頭部６１を被締結部材４に当接させ、ボルト６の雄ねじ部６２の先端側よりナット１を螺合させる。このとき、ナット１の溝部１４に組み込まれているコイルスプリング２は、図４（ｂ）に示すように、側面部２１が溝部１４内の側壁部１７及び底面部１５に接触し、側壁部１８の伸長部１８２の端縁部（端面）１８３に当接している。そして、コイルスプリング２は溝部１４内で保持され、コイルスプリング２の側面部２１の一部は、図４（ｂ）に示すように、ナット１の下面部１２より***している（突出している）。溝部１４内で保持されたコイルスプリング２の、コイルスプリング２の長手方向を横断する方向（断面方向）の形状は、図４（ｂ）に示すように、断面略円形形状をなしている。   As shown in FIG. 4, in order to overlap and fasten the plate-like fastened members 3, 4, the fastened members 3, 4, which are provided in advance in the fastened members 3, 4 are overlapped with each other. 4 are overlapped and the male threaded portion 62 of the bolt 6 is passed through a hole (not shown). Then, as shown in FIG. 4A, the head 61 of the bolt 6 that is the first coupling member is brought into contact with the fastened member 4, and the nut 1 is screwed from the front end side of the male screw portion 62 of the bolt 6. . At this time, as shown in FIG. 4B, the coil spring 2 incorporated in the groove portion 14 of the nut 1 has the side surface portion 21 in contact with the side wall portion 17 and the bottom surface portion 15 in the groove portion 14, and the side wall portion 18. Is in contact with an end edge (end surface) 183 of the elongated portion 182. And the coil spring 2 is hold | maintained in the groove part 14, and a part of side part 21 of the coil spring 2 protrudes (projects) from the lower surface part 12 of the nut 1, as shown in FIG.4 (b). ). The shape of the coil spring 2 held in the groove 14 in the direction (cross-sectional direction) crossing the longitudinal direction of the coil spring 2 has a substantially circular cross section as shown in FIG.

そして、ボルト６の雄ねじ部６２の先端側に螺合させたナット１を被締結部材３側へ移動し、図５（ａ）に示すように、ナット１の下面部１２より***している（突出している）コイルスプリング２の側面部２１の一部を被締結部材３に当接する。その結果、図５（ｂ）に示すように、コイルスプリング２はナット１の溝部１４と被締結部材３との間に挟み込まれ、コイルスプリング２の長手方向を横断する方向（断面方向）からコイルスプリング２の側面部２１に押圧が加わる。以上のように、コイルスプリング２の一部が被締結部材３に当接することになり、溝部１４内の底面部１５と被締結部材３と、からの押圧がコイルスプリング２に加わる。コイルスプリング２に押圧が加わることでコイルスプリング２の変形がはじまる。   Then, the nut 1 screwed into the distal end side of the male threaded portion 62 of the bolt 6 is moved to the fastened member 3 side, and is raised from the lower surface portion 12 of the nut 1 as shown in FIG. A part of the side surface portion 21 of the coil spring 2 that protrudes is brought into contact with the fastened member 3. As a result, as shown in FIG. 5B, the coil spring 2 is sandwiched between the groove portion 14 of the nut 1 and the fastened member 3, and the coil spring 2 is coiled from the direction (cross-sectional direction) that crosses the longitudinal direction of the coil spring 2. A pressure is applied to the side surface portion 21 of the spring 2. As described above, a part of the coil spring 2 comes into contact with the fastened member 3, and pressure from the bottom surface portion 15 in the groove 14 and the fastened member 3 is applied to the coil spring 2. When the coil spring 2 is pressed, deformation of the coil spring 2 starts.

ボルト６の雄ねじ部６２に螺合させたナット１の螺合をさらに進めて、ナット１の下面部１２を被締結部材３に近づける。ナット１の下面部１２が被締結部材３に近づくことで、コイルスプリング２にはさらに断面方向からの押圧が加わり、コイルスプリング２の、下面部１２より突出している側面部２１の一部が溝部１４内へ入り込み始め、コイルスプリング２の形状である断面略円形形状は崩れていく。そして、図６（ａ）に示すように、ボルト６の雄ねじ部６２に螺合させたナット１の螺合を進めて、ナット１の下面部１２を被締結部材３に当接させる。   The nut 1 screwed into the male screw portion 62 of the bolt 6 is further screwed to bring the lower surface portion 12 of the nut 1 closer to the fastened member 3. When the lower surface portion 12 of the nut 1 approaches the fastened member 3, the coil spring 2 is further pressed from the cross-sectional direction, and a part of the side surface portion 21 protruding from the lower surface portion 12 of the coil spring 2 is a groove portion. As the coil spring 2 starts to enter, the substantially circular cross section of the coil spring 2 is broken. Then, as shown in FIG. 6A, the nut 1 screwed into the male threaded portion 62 of the bolt 6 is advanced, and the lower surface portion 12 of the nut 1 is brought into contact with the fastened member 3.

ナット１の下面部１２が被締結部材３に当接することで、図６（ｂ）に示すように、コイルスプリング２の、下面部１２より突出している一部が開口部１４１から溝部１４内に入り込み、コイルスプリング２の側面部２１の側壁部１７及び底面部１５に接触する領域が拡大する。また、側壁部１８側の、コイルスプリング２の側面部２１が側壁部１８側に移動する。本例では、側壁部１８側の、コイルスプリング２の側面部２１が側壁部１８に接触する。ただし、本例のコイルスプリング２と異なる場合には、側壁部１８に接近するにとどまる場合もあり得る。   When the lower surface portion 12 of the nut 1 abuts on the member 3 to be fastened, a part of the coil spring 2 protruding from the lower surface portion 12 enters the groove portion 14 from the opening portion 141 as shown in FIG. The region that comes into contact with the side wall portion 17 and the bottom surface portion 15 of the side surface portion 21 of the coil spring 2 is enlarged. Further, the side surface portion 21 of the coil spring 2 on the side wall portion 18 side moves to the side wall portion 18 side. In this example, the side surface portion 21 of the coil spring 2 on the side wall portion 18 side contacts the side wall portion 18. However, if it is different from the coil spring 2 of this example, there may be a case where the side wall portion 18 is only approached.

さらに、ボルト６の雄ねじ部６２に螺合させたナット１の螺合を進めて、ナット１が回転しなくなるまでナット１を回転させてナット１の下面部１２を被締結部材３上で摺動させてナット１が回転させることで、ボルト６の頭部６１とナット１とで被締結部材３、４を締結したことになる（図６（ａ）参照）。このとき、ナット１の溝部１４の開口部１４１は被締結部材３により閉じられ、コイルスプリング２は溝部１４内に収納された状態になり（図６（ｂ）参照）、溝部１４内に収納されたコイルスプリング２の、ボルト６とナット１との螺合による押圧に対する反力が被締結部材３に当接している、コイルスプリング２の一部からの被締結部材３側に加わる。そのため、ボルト６とナット１との螺合部に押圧が加わることになり、ボルト６とナット１との螺合部の摩擦力が高まり、被締結部材３、４の締結が完了する。   Further, the nut 1 screwed into the male threaded portion 62 of the bolt 6 is advanced, and the nut 1 is rotated until the nut 1 stops rotating to slide the lower surface portion 12 of the nut 1 on the fastened member 3. When the nut 1 is rotated, the fastened members 3 and 4 are fastened by the head 61 of the bolt 6 and the nut 1 (see FIG. 6A). At this time, the opening 141 of the groove portion 14 of the nut 1 is closed by the fastened member 3, and the coil spring 2 is housed in the groove portion 14 (see FIG. 6B), and is housed in the groove portion 14. The reaction force against the pressing of the coil spring 2 by the screwing of the bolt 6 and the nut 1 is applied to the fastened member 3 side from the part of the coil spring 2 that is in contact with the fastened member 3. Therefore, pressure is applied to the screwed portion between the bolt 6 and the nut 1, the frictional force of the screwed portion between the bolt 6 and the nut 1 is increased, and the fastening of the fastened members 3 and 4 is completed.

以上では緩み防止機構付き結合部材としてナット１を例にとって説明したが、緩み防止機構付き結合部材はナット１に限定されるものではなく、例えば、リング部材である座金についても緩み防止機構付き結合部材として用いることが可能である。以下では、緩み防止機構付き結合部材である座金５について説明する。   Although the nut 1 has been described above as an example of the coupling member with the loosening prevention mechanism, the coupling member with the loosening prevention mechanism is not limited to the nut 1. For example, the coupling member with the loosening prevention mechanism is also used for a washer that is a ring member. Can be used. Below, the washer 5 which is a coupling member with a loosening prevention mechanism is demonstrated.

（例２）
本発明である緩み防止機構付き結合部材である座金５が図７に示されている。座金５は、図７に示すように、円盤状の形状をなしており、座金５の軸方向に沿って、中心孔５３が形成されている。中心孔５３には、本例では雌ねじ部を形成することなく滑らかな面に形成されているが、雌ねじ部を形成することも可能である。また、中心孔５３は、ボルト６の雄ねじ部６２を容易に通すことが可能な径に形成されている。座金５の直径は、本例では３０ｍｍとしているが、特に３０ｍｍに限定されるものではなく、３０ｍｍより大きくすることも可能であるし、３０ｍｍより小さくすることも可能である。また、中心孔５３の径は、例１と同様に本例では１０ｍｍとしているが、特に１０ｍｍに限定されるものではなく、１０ｍｍより大きくすることも可能であるし、１０ｍｍより小さくすることも可能である。さらに、座金５の厚みは、本例では８ｍｍとしているが、特に８ｍｍに限定されるものではなく、８ｍｍより大きくすることも可能であるし、８ｍｍより小さくすることも可能である。 (Example 2)
A washer 5 which is a coupling member with a loosening prevention mechanism according to the present invention is shown in FIG. As shown in FIG. 7, the washer 5 has a disk shape, and a central hole 53 is formed along the axial direction of the washer 5. In the present embodiment, the center hole 53 is formed on a smooth surface without forming a female screw portion, but it is also possible to form a female screw portion. The center hole 53 is formed to have a diameter that allows the male threaded portion 62 of the bolt 6 to be easily passed therethrough. Although the diameter of the washer 5 is 30 mm in this example, it is not particularly limited to 30 mm, and can be larger than 30 mm or smaller than 30 mm. In addition, the diameter of the center hole 53 is 10 mm in this example as in Example 1. However, the diameter is not particularly limited to 10 mm, and can be larger than 10 mm or smaller than 10 mm. It is. Furthermore, although the thickness of the washer 5 is 8 mm in this example, it is not particularly limited to 8 mm, and can be larger than 8 mm or smaller than 8 mm.

座金５の一方の平面部５２には、図７（ｂ）に示すように、中心孔５３と同心状の溝部５６が形成されている。溝部５６は、座金５の外周５９よりに形成されている。また、座金５の他方の平面部５１には、図７（ａ）に示すように、中心孔５３と同心状の溝部５４が形成されている。溝部５４は、座金５の中心孔５３よりに形成されている。溝部５４、５６は、図７（ａ）及び図７（ｂ）に示すように、円で形成されているが、円に近い円弧の形状をとることも可能である。また、本例の円で形成された溝部５４、５６の、平面部５１、５２上に形成された溝部５４、５６の幅Ｗ、Ｗ´はそれぞれ均一になっている。図７（ａ）に示す溝部５４では幅Ｗとし、図７（ｂ）に示す溝部５６では幅Ｗ´としているが、本例では幅Ｗと幅Ｗ´は同じになっている。ただし、溝部５４の幅Ｗと溝部５６の幅Ｗ´を異なるようにすることも可能である。   As shown in FIG. 7B, a groove 56 concentric with the center hole 53 is formed in one flat portion 52 of the washer 5. The groove portion 56 is formed from the outer periphery 59 of the washer 5. Further, as shown in FIG. 7A, a groove 54 concentric with the center hole 53 is formed in the other flat portion 51 of the washer 5. The groove 54 is formed from the central hole 53 of the washer 5. As shown in FIGS. 7A and 7B, the grooves 54 and 56 are formed in a circle, but may have an arc shape close to the circle. In addition, the widths W and W ′ of the groove portions 54 and 56 formed on the flat surface portions 51 and 52 of the groove portions 54 and 56 formed of a circle in this example are uniform. In the groove portion 54 shown in FIG. 7A, the width W is set, and in the groove portion 56 shown in FIG. 7B, the width W ′ is set. In this example, the width W and the width W ′ are the same. However, the width W of the groove portion 54 and the width W ′ of the groove portion 56 may be different.

そして、溝部５４、５６には、弾性部材であるコイルスプリング２、２が組み込まれることになる（図８（ｂ）参照）。この溝部５４、５６は、図８（ａ）に示すように、座金５の軸方向の断面では対向しており、溝部５４より溝部５６の方が径が大きく形成されている。また、本例では、溝部５４、５６の、座金５の軸方向に沿う長さ（深さ）は、同じである。ただし、溝部５４、５６の、座金５の軸方向に沿う長さ（深さ）は、同じにすることに限定されず、溝部５４、５６の、座金５の軸方向に沿う長さ（深さ）を異なるようにすることも可能である。その場合、溝部５４、溝部５６に組み込まれる弾性部材であるコイルスプリング２の長手方向を横断する断面方向の径の大きさが異なる弾性部材であるコイルスプリング２が組み込まれることになる。   And the coil springs 2 and 2 which are elastic members are integrated in the groove parts 54 and 56 (refer FIG.8 (b)). As shown in FIG. 8A, the groove portions 54 and 56 face each other in the axial cross section of the washer 5, and the groove portion 56 is formed to have a larger diameter than the groove portion 54. In this example, the lengths (depths) of the grooves 54 and 56 along the axial direction of the washer 5 are the same. However, the length (depth) of the grooves 54 and 56 along the axial direction of the washer 5 is not limited to the same, and the length (depth) of the grooves 54 and 56 along the axial direction of the washer 5 is not limited. ) Can be different. In that case, the coil spring 2 which is an elastic member having different diameters in the cross-sectional direction across the longitudinal direction of the coil spring 2 which is an elastic member incorporated in the groove portion 54 and the groove portion 56 is incorporated.

また、図８（ｃ）に示すように、溝部５４、５６の、座金５の軸方向の断面は、例１の溝部１４と同様に、矩形形状に近い形状で形成されている。つまり、一方の平面部５２側では、溝部５６の、中心孔５３側に形成された側壁部５７は座金５の平面部５２から垂直に座金５の平面部５１に向かって（座金５の軸方向に沿って）形成されている。また、他方の平面部５１側では、溝部５４の、中心孔５３側に形成された側壁部５７は座金５の平面部５１から垂直に座金５の平面部５２に向かって（座金５の軸方向に沿って）形成されている。本例では、側壁部５７は座金５の平面部５１、或いは平面部５２から座金５の軸方向に沿って長さ（深さ）５ｍｍ程度としている。基本的には、側壁部５７は幅Ｗより若干長く形成されている。そして、側壁部５７の端縁部５７１と反対側の端縁部５５１から端縁部５５２までの、溝部５４の底面部５５は座金５の平面部５１（及び平面部５２）と平行に形成されており、幅Ｗより長く形成されている（図８（ｃ）参照）。   Further, as shown in FIG. 8C, the cross section in the axial direction of the washer 5 of the groove portions 54 and 56 is formed in a shape close to a rectangular shape, like the groove portion 14 of Example 1. That is, on one flat surface portion 52 side, the side wall portion 57 formed on the central hole 53 side of the groove portion 56 is perpendicularly directed from the flat surface portion 52 of the washer 5 toward the flat surface portion 51 of the washer 5 (the axial direction of the washer 5). Along). Further, on the other flat portion 51 side, the side wall portion 57 formed on the central hole 53 side of the groove portion 54 is directed vertically from the flat portion 51 of the washer 5 toward the flat portion 52 of the washer 5 (in the axial direction of the washer 5). Along). In this example, the side wall portion 57 has a length (depth) of about 5 mm along the axial direction of the washer 5 from the flat portion 51 of the washer 5 or the flat portion 52. Basically, the side wall 57 is formed slightly longer than the width W. The bottom surface portion 55 of the groove portion 54 from the end edge portion 551 opposite to the end edge portion 571 of the side wall portion 57 to the end edge portion 552 is formed in parallel with the flat surface portion 51 (and the flat surface portion 52) of the washer 5. And longer than the width W (see FIG. 8C).

そして、底面部５５の端縁部５５２からは外周５９側の側壁部５８が形成されている。側壁部５８は、図８（ｃ）に示すように、側壁部５７と平行に（平面部５１、５２に対して垂直に）、溝部５４の場合には平面部５１側へ、溝部５６の場合には平面部５２側へ向かって形成されている。溝部５４の、側壁部５８側の平面部５１近傍では、円弧部５８１が形成されており、円弧部５８１に沿って側壁部５８側の平面部５１近傍が側壁部５７に向かって伸びている。また、溝部５６の、側壁部５８側の平面部５２近傍では、円弧部５８１が形成されており、円弧部５８１に沿って側壁部５８側の平面部５２近傍が側壁部５７に向かって伸びている。   A side wall 58 on the outer periphery 59 side is formed from the end edge 552 of the bottom surface 55. As shown in FIG. 8C, the side wall portion 58 is parallel to the side wall portion 57 (perpendicular to the flat surface portions 51 and 52), and in the case of the groove portion 54, toward the flat surface portion 51, and in the case of the groove portion 56. Is formed toward the flat portion 52 side. An arc portion 581 is formed in the vicinity of the flat surface portion 51 on the side wall portion 58 side of the groove portion 54, and the vicinity of the flat surface portion 51 on the side wall portion 58 side extends toward the side wall portion 57 along the circular arc portion 581. In addition, an arc portion 581 is formed in the vicinity of the flat portion 52 on the side wall portion 58 side of the groove portion 56, and the vicinity of the flat portion 52 on the side wall portion 58 side extends toward the side wall portion 57 along the arc portion 581. Yes.

つまり、図８（ｃ）に示すように、側壁部５８の平面部５１近傍が側壁部５８から連続する伸長部５８２となり、伸長部５８２が側壁部５７に向かって突出し、伸長部５８２の端縁部（端面）５８３が側壁部５７に対向している。そのため、溝部５４の開口部５４１のＷ方向の長さは底面部５５のＷ方向の長さより短くなっている。また、図８（ｃ）に示すように、側壁部５８の平面部５２近傍が側壁部５８から連続する伸長部５８２となり、伸長部５８２が側壁部５７に向かって突出し、伸長部５８２の端縁部（端面）５８３が側壁部５７に対向している。そのため、溝部５６の開口部５６１のＷ方向の長さは底面部５５のＷ方向の長さより短くなっている。   That is, as shown in FIG. 8C, the vicinity of the flat portion 51 of the side wall portion 58 becomes an extended portion 582 that continues from the side wall portion 58, and the extended portion 582 protrudes toward the side wall portion 57, and the edge of the extended portion 582 A portion (end surface) 583 faces the side wall portion 57. Therefore, the length in the W direction of the opening 541 of the groove portion 54 is shorter than the length in the W direction of the bottom surface portion 55. Further, as shown in FIG. 8C, the vicinity of the flat portion 52 of the side wall portion 58 becomes an extended portion 582 that continues from the side wall portion 58, and the extended portion 582 protrudes toward the side wall portion 57, and the edge of the extended portion 582 A portion (end surface) 583 faces the side wall portion 57. Therefore, the length in the W direction of the opening 561 of the groove portion 56 is shorter than the length in the W direction of the bottom surface portion 55.

溝部５４、５６内には、弾性部材２、２が組み込まれることになる。本例では、弾性部材２としてコイルスプリング２を溝部５４に組み込んでいる。具体的には、図９に示すように、弾性部材２であるコイルスプリング２の端部２２、２３同士を接近させてコイルスプリング２をリング形状にして、図９（ｂ）に示すように、矢印方向に沿ってコイルスプリング２を移動し、座金５の一方の平面部５２に形成された溝部５６に沿うように組み込んでおり（図８（ｂ）参照）、また、コイルスプリング２の端部２２、２３同士を接近させてコイルスプリング２をリング形状にして、図９（ａ）に示すように、矢印方向に沿ってコイルスプリング２を移動し、座金５の他方の平面部５１に形成された溝部５４に沿うように組み込んでいる（図８（ｂ）参照）。   The elastic members 2 and 2 are incorporated in the grooves 54 and 56. In this example, the coil spring 2 is incorporated in the groove portion 54 as the elastic member 2. Specifically, as shown in FIG. 9, the end portions 22 and 23 of the coil spring 2, which is the elastic member 2, are brought close to each other to form the coil spring 2 in a ring shape, and as shown in FIG. The coil spring 2 is moved along the direction of the arrow, and is assembled along the groove 56 formed in the one flat portion 52 of the washer 5 (see FIG. 8B). As shown in FIG. 9A, the coil spring 2 is moved along the direction of the arrow so that the coil springs 2 and 23 are brought close to each other and formed on the other flat portion 51 of the washer 5. It is incorporated along the groove 54 (see FIG. 8B).

コイルスプリング２がそれぞれ溝部５４、５６に組み込まれると、図８（ｃ）に示すように、コイルスプリング２の側面側２１は側壁部５７及び底面部５５に接触し、コイルスプリング２の側壁部５８側は、側壁部５８側へ張り出し、伸長部５８２の端縁部（端面）５８３よりも側壁部５８側へ接近し、側壁部５８側の伸長部５８２の端縁部（端面）５８３にコイルスプリング２の側面側２１が当接することになる。その結果、コイルスプリング２、は溝部５４、５６内に保持されることになり、座金５の一方の平面部５２よりコイルスプリング２の側面部２１の一部が***する（突出する）とともに、座金５の他方の平面部５１よりコイルスプリング２の側面部２１の一部が***する（突出する）ことになる。   When the coil spring 2 is incorporated into the groove portions 54 and 56, respectively, as shown in FIG. 8C, the side surface 21 of the coil spring 2 contacts the side wall portion 57 and the bottom surface portion 55, and the side wall portion 58 of the coil spring 2 is obtained. The side protrudes toward the side wall 58, comes closer to the side wall 58 than the end edge (end surface) 583 of the extended portion 582, and is coiled to the end edge (end surface) 583 of the extended portion 582 on the side wall 58 side. The two side surfaces 21 come into contact with each other. As a result, the coil spring 2 is held in the grooves 54 and 56, and a part of the side surface portion 21 of the coil spring 2 is raised (projects) from the one flat surface portion 52 of the washer 5, and the washer. A part of the side surface portion 21 of the coil spring 2 protrudes (protrudes) from the other flat surface portion 51 of FIG.

以上のようにして、溝部５４、５６内には、例１と同様に、弾性部材２、２としてコイルスプリング２、２が組み込まれることになる。つまり、座金５の平面部５１、５２では、図８（ｂ）に示すように、座金５の平面部５１の溝部５４に弾性部材２であるコイルスプリング２が組み込まれ、座金５の平面部５２の溝部５６に弾性部材２であるコイルスプリング２が組み込まれることになる。   As described above, the coil springs 2 and 2 are incorporated in the grooves 54 and 56 as the elastic members 2 and 2 in the same manner as in Example 1. That is, in the flat portions 51 and 52 of the washer 5, as shown in FIG. 8B, the coil spring 2 as the elastic member 2 is incorporated in the groove portion 54 of the flat portion 51 of the washer 5, and the flat portion 52 of the washer 5. The coil spring 2 as the elastic member 2 is incorporated into the groove portion 56.

以上が本発明である例２に示す緩み防止機構付き結合部材である座金５の構造であり、つぎにこの座金５を用いての被締結部材３、４の締結について説明する。   The above is the structure of the washer 5 that is the coupling member with the loosening prevention mechanism shown in Example 2 of the present invention. Next, fastening of the fastened members 3 and 4 using the washer 5 will be described.

図１０に示すように、板状の被締結部材３、４を重ね合わせて締結するために、被締結部材３、４に予め設けられた、図示しない孔部が重なり合うようにして被締結部材３、４を重ね合わせて図示しない孔部に第一結合部材であるボルト６の雄ねじ部６２を通す。そして、図１０に示すように、ボルト６の頭部６１を被締結部材４に当接させる。被締結部材３、４の図示しない孔部に通したボルト６の雄ねじ部６２に座金５の中心孔５３を通す。本例においては、座金５は平面部５２側の、径が大きい溝部５６に組み込んだ弾性部材２であるコイルスプリング２を被締結部材３と対向させて、雄ねじ部６２に沿って座金５を被締結部材３側へ移動する。   As shown in FIG. 10, in order to overlap and fasten the plate-like fastened members 3, 4, the fastened members 3, which are provided in advance in the fastened members 3, 4 so as to overlap with each other, are overlapped. 4 are overlapped, and the male threaded portion 62 of the bolt 6 as the first coupling member is passed through a hole (not shown). Then, as shown in FIG. 10, the head 61 of the bolt 6 is brought into contact with the fastened member 4. The central hole 53 of the washer 5 is passed through the male threaded portion 62 of the bolt 6 that is passed through a hole portion (not shown) of the fastened members 3 and 4. In this example, the washer 5 is covered with the washer 5 along the male screw portion 62 with the coil spring 2, which is the elastic member 2 incorporated in the groove portion 56 having a large diameter, on the flat portion 52 side facing the fastened member 3. It moves to the fastening member 3 side.

このとき、座金５の溝部５４、５６に組み込まれているコイルスプリング２、２は、例１の溝部１４に組み込まれているコイルスプリング２と同様に、側面部２１が溝部５４、５６内の側壁部５７及び底面部５５に接触し、側壁部５８の伸長部５８２の端縁部（端面）５８３に当接している。そして、コイルスプリング２、２は溝部５４、５６内で保持され、コイルスプリング２、２の側面部２１の一部は、図１０（ａ）に示すように、座金５の平面部５１、５２より***している（突出している）。そして、溝部５４、５６内で保持されたコイルスプリング２の、コイルスプリング２の長手方向を横断する方向（断面方向）の形状は、図１０（ｂ）に示すように、例１の溝部１４に組み込まれているコイルスプリング２と同様に、断面略円形形状をなしている（図１０（ｂ）参照）。   At this time, the coil springs 2 and 2 incorporated in the grooves 54 and 56 of the washer 5 have side surfaces 21 in the side walls in the grooves 54 and 56 in the same manner as the coil spring 2 incorporated in the groove 14 of Example 1. It contacts the portion 57 and the bottom surface portion 55, and abuts against an end edge portion (end surface) 583 of the extending portion 582 of the side wall portion 58. And the coil springs 2 and 2 are hold | maintained in the groove parts 54 and 56, and a part of side part 21 of the coil springs 2 and 2 is from the plane parts 51 and 52 of the washer 5, as shown to Fig.10 (a). It is raised (protruding). The shape of the coil spring 2 held in the groove portions 54 and 56 in the direction (cross-sectional direction) crossing the longitudinal direction of the coil spring 2 is the same as that of the groove portion 14 of Example 1 as shown in FIG. Similar to the coil spring 2 incorporated, it has a substantially circular cross section (see FIG. 10B).

そして、図１０（ａ）に示すように、座金５の平面部５２より***している（突出している）コイルスプリング２の側面部２１の一部を被締結部材３に当接させる。そして、ボルト６の雄ねじ部６２の先端側より第二結合部材であるナット７を螺合させる。そして、ボルト６の雄ねじ部６２の先端側に螺合させたナット７を被締結部材３側へ移動し、図１１（ａ）に示すように、ナット７の底面部７１を座金５の平面部５１より***している（突出している）コイルスプリング２の側面部２１に当接する。その結果、図１１（ａ）に示すように、座金５の平面部５２側のコイルスプリング２は座金５の溝部５６と被締結部材３との間に挟み込まれ、コイルスプリング２の長手方向を横断する方向（断面方向）からコイルスプリング２の側面部２１に押圧が加わる。また、図１１（ａ）に示すように、座金５の平面部５１側のコイルスプリング２は座金５の溝部５４とナット７の底面部７１との間に挟み込まれ、コイルスプリング２の長手方向を横断する方向（断面方向）からコイルスプリング２の側面部２１に押圧が加わる。   Then, as shown in FIG. 10A, a part of the side surface portion 21 of the coil spring 2 protruding (projecting) from the flat portion 52 of the washer 5 is brought into contact with the fastened member 3. And the nut 7 which is a 2nd coupling member is screwed together from the front end side of the external thread part 62 of the volt | bolt 6. FIG. Then, the nut 7 screwed to the front end side of the male screw portion 62 of the bolt 6 is moved to the fastened member 3 side, and the bottom surface portion 71 of the nut 7 is moved to the flat portion of the washer 5 as shown in FIG. 51 abuts on the side surface portion 21 of the coil spring 2 protruding (projecting) from 51. As a result, as shown in FIG. 11A, the coil spring 2 on the flat portion 52 side of the washer 5 is sandwiched between the groove portion 56 of the washer 5 and the fastened member 3 and crosses the longitudinal direction of the coil spring 2. The pressing is applied to the side surface portion 21 of the coil spring 2 from the direction (cross-sectional direction). 11A, the coil spring 2 on the flat portion 51 side of the washer 5 is sandwiched between the groove portion 54 of the washer 5 and the bottom surface portion 71 of the nut 7, and the longitudinal direction of the coil spring 2 is changed. Pressing is applied to the side surface portion 21 of the coil spring 2 from the crossing direction (cross-sectional direction).

以上のように、コイルスプリング２、２の側面部２１の一部がナット７の底面部７１及び被締結部材３に当接することになり、溝部５４内の底面部１５とナット７の底面部７１と、からの押圧がコイルスプリング２に加わり、溝部５６内の底面部１５と被締結部材３と、からの押圧がコイルスプリング２に加わることでコイルスプリング２の変形がはじまる（図１１（ｂ）参照）。ボルト６の雄ねじ部６２に螺合させたナット７の螺合をさらに進めて、ナット７の底面部７１を被締結部材３に近づける。ナット７の底面部７１が被締結部材３に近づくことで、コイルスプリング２、２にはさらに断面方向からの押圧が加わる。コイルスプリング２の、一方の平面部５２より突出している側面部２１の一部が溝部５６内へ入り込み始め、コイルスプリング２の形状である断面略円形形状は崩れていき、コイルスプリング２の、他方の平面部５１より突出している側面部２１の一部が溝部５４内へ入り込み始め、コイルスプリング２の形状である断面略円形形状は崩れていく。そして、図１２（ａ）に示すように、ボルト６の雄ねじ部６２に螺合させたナット７の螺合を進めて、ナット７の底面部７１を座金５の平面部５１に当接させる。   As described above, a part of the side surface portion 21 of the coil springs 2 and 2 comes into contact with the bottom surface portion 71 of the nut 7 and the fastened member 3, and the bottom surface portion 15 in the groove portion 54 and the bottom surface portion 71 of the nut 7. Then, the pressure from the coil spring 2 is applied to the coil spring 2, and the deformation from the coil spring 2 starts when the pressure from the bottom surface portion 15 in the groove portion 56 and the fastened member 3 is applied to the coil spring 2 (FIG. 11B). reference). The nut 7 screwed into the male threaded portion 62 of the bolt 6 is further screwed to bring the bottom surface portion 71 of the nut 7 closer to the fastened member 3. As the bottom surface portion 71 of the nut 7 approaches the fastened member 3, the coil springs 2 and 2 are further pressed from the cross-sectional direction. Part of the side surface portion 21 of the coil spring 2 protruding from the one flat surface portion 52 starts to enter the groove portion 56, and the substantially circular cross-sectional shape that is the shape of the coil spring 2 is crushed. Part of the side surface portion 21 protruding from the flat surface portion 51 begins to enter the groove portion 54, and the substantially circular cross-sectional shape that is the shape of the coil spring 2 is broken. Then, as shown in FIG. 12A, the screwing of the nut 7 screwed into the male screw part 62 of the bolt 6 is advanced, and the bottom part 71 of the nut 7 is brought into contact with the flat part 51 of the washer 5.

ナット７の底面部７１が座金５の平面部５１に当接することで、図１２（ｂ）に示すように、コイルスプリング２の、平面部５１より突出している側面部２１の一部が開口部５４１から溝部５４内に入り込み、コイルスプリング２の側面部２１の側壁部５７及び底面部５５に接触する領域が拡大する。また、コイルスプリング２の、平面部５２より突出している側面部２１の一部が開口部５６１から溝部５６内に入り込み、コイルスプリング２の側面部２１の側壁部５７及び底面部５５に接触する領域が拡大する。さらに、溝部５４、５６においては、側壁部５８側の、コイルスプリング２の側面部２１が側壁部５８側に移動する。本例では、側壁部５８側の、コイルスプリング２の側面部２１が側壁部５８に接触する。ただし、本例のコイルスプリング２と異なる場合には、側壁部５８に接近するにとどまる場合もあり得る。   Since the bottom surface portion 71 of the nut 7 abuts on the flat surface portion 51 of the washer 5, a part of the side surface portion 21 of the coil spring 2 protruding from the flat surface portion 51 is an opening as shown in FIG. The region that enters the groove portion 54 from 541 and contacts the side wall portion 57 and the bottom surface portion 55 of the side surface portion 21 of the coil spring 2 is enlarged. Further, a part of the side surface portion 21 of the coil spring 2 protruding from the flat surface portion 52 enters the groove portion 56 from the opening portion 561 and contacts the side wall portion 57 and the bottom surface portion 55 of the side surface portion 21 of the coil spring 2. Expands. Furthermore, in the groove parts 54 and 56, the side part 21 of the coil spring 2 on the side wall part 58 side moves to the side wall part 58 side. In this example, the side surface portion 21 of the coil spring 2 on the side wall portion 58 side contacts the side wall portion 58. However, if it is different from the coil spring 2 of this example, there may be a case where the side wall 58 is only approached.

さらに、ボルト６の雄ねじ部６２に螺合させたナット７の螺合を進めて、ナット７が回転しなくなるまでナット７を回転させてナット７の底面部７１を座金５上で摺動させることで、ボルト６とナット７とで被締結部材３、４を締結したことになる（図１２（ａ）参照）。このとき、座金５の溝部５４の開口部５４１はナット７の底面部７１により閉じられ、コイルスプリング２は溝部５４内に収納された状態になり、溝部５４内に収納されたコイルスプリング２の、ボルト６とナット７との螺合による押圧に対する反力がナット７の底面部７１に当接している、コイルスプリング２の側面部２１の一部からナット７の底面部７１側に加わる（図１２（ａ）参照）。また、座金５の溝部５６の開口部５６１は被締結部材３により閉じられ、コイルスプリング２は溝部５６内に収納された状態になり、溝部５６内に収納されたコイルスプリング２の、ボルト６とナット７との螺合による押圧に対する反力が被締結部材３に当接している、コイルスプリング２の側面部２１の一部から被締結部材３側に加わる（図１２（ａ）参照）。   Further, the nut 7 screwed into the male threaded portion 62 of the bolt 6 is advanced, and the nut 7 is rotated until the nut 7 stops rotating to slide the bottom surface portion 71 of the nut 7 on the washer 5. Thus, the fastened members 3 and 4 are fastened by the bolt 6 and the nut 7 (see FIG. 12A). At this time, the opening 541 of the groove portion 54 of the washer 5 is closed by the bottom surface portion 71 of the nut 7, and the coil spring 2 is housed in the groove portion 54, and the coil spring 2 housed in the groove portion 54 is A reaction force against pressing by the screwing of the bolt 6 and the nut 7 is applied to the bottom surface 71 side of the nut 7 from a part of the side surface 21 of the coil spring 2 that is in contact with the bottom surface 71 of the nut 7 (FIG. 12). (See (a)). Further, the opening 561 of the groove portion 56 of the washer 5 is closed by the fastened member 3, and the coil spring 2 is housed in the groove portion 56, and the bolt 6 of the coil spring 2 housed in the groove portion 56 and A reaction force against pressing by screwing with the nut 7 is applied to the fastened member 3 side from a part of the side surface portion 21 of the coil spring 2 that is in contact with the fastened member 3 (see FIG. 12A).

その結果、その結果、ボルト６とナット７との螺合部に押圧が加わることになり、ボルト６とナット７との螺合部の摩擦力が高まり、被締結部材３、４の締結が完了する。   As a result, pressure is applied to the screwed portion between the bolt 6 and the nut 7, the frictional force of the screwed portion between the bolt 6 and the nut 7 is increased, and the fastening of the fastened members 3 and 4 is completed. To do.

（例３）
例２においては、座金５の、一方の平面部５２に形成された溝部５６と他方の平面部５１に形成された溝部５４との径が異なる場合を示したが、例３では、座金５の、一方の平面部５２に形成された溝部５６と他方の平面部５１に形成された溝部５４とが同一になる場合を示している。例３に示す座金５では、図１３に示すように、溝部５４と溝部５６の径が同じであるとともに、溝部５４と溝部５６の幅Ｗも同じである（図１３（ａ）、図１３（ｂ））。例３では、溝部５４と溝部５６の径が同じという以外は、例２と同一の構成である。そして、溝部５４、５６は、図１４（ａ）に示すように、座金５の軸方向の断面では対向している。 (Example 3)
In Example 2, the case where the diameter of the groove part 56 formed in one plane part 52 and the groove part 54 formed in the other plane part 51 of the washer 5 is different is shown. The case where the groove part 56 formed in one plane part 52 and the groove part 54 formed in the other plane part 51 are the same is shown. In the washer 5 shown in Example 3, as shown in FIG. 13, the diameter of the groove 54 and the groove 56 is the same, and the width W of the groove 54 and the groove 56 is also the same (FIGS. 13A and 13 ( b)). Example 3 has the same configuration as Example 2 except that the diameters of the groove 54 and the groove 56 are the same. And the groove parts 54 and 56 are opposing in the cross section of the axial direction of the washer 5, as shown to Fig.14 (a).

そして、弾性部材であるコイルスプリング２が組み込まれる溝部５４、５６では、例２と同様に、座金５の軸方向に沿う長さ（深さ）は、同じである。また、溝部５４、５６の、座金５の軸方向の断面は、図１４（ｃ）に示すように、例２と同様に、矩形形状に近い形状で形成されている。つまり、例２と同様に、溝部５４の、中心孔５３側に側壁部５７が形成され、、側壁部５７の、座金５の平面部５１側の端縁部５７１と反対側の端縁部５５１から端縁部５５２までの、溝部５４の底面部５５は座金５の平面部５１（及び平面部５２）と平行に形成され（図１４（ｃ）参照）、底面部５５の端縁部５５２からは外周５９側の側壁部５８が形成されている。   And in the groove parts 54 and 56 in which the coil spring 2 which is an elastic member is incorporated, the length (depth) along the axial direction of the washer 5 is the same as in Example 2. Further, as shown in FIG. 14C, the cross sections of the grooves 54 and 56 in the axial direction of the washer 5 are formed in a shape close to a rectangular shape as in the second example. That is, as in Example 2, the side wall 57 is formed on the side of the central hole 53 of the groove 54, and the side edge 57 of the side wall 57 opposite to the edge 571 on the flat surface 51 side of the washer 5 is provided. The bottom surface portion 55 of the groove portion 54 from the edge portion 552 to the end edge portion 552 is formed in parallel with the flat surface portion 51 (and the flat surface portion 52) of the washer 5 (see FIG. 14C), and from the end edge portion 552 of the bottom surface portion 55 Is formed with a side wall 58 on the outer periphery 59 side.

側壁部５８は、例２と同様に、図１４（ｃ）に示すように、側壁部５７と平行に形成されている。側壁部５８側の平面部５１近傍では、例２と同様に、円弧部５８１が形成されており、円弧部５８１に沿って側壁部５８側の平面部５１近傍が側壁部５７に向かって伸びている。また、溝部５６の、側壁部５８側の平面部５２近傍では、円弧部５８１が形成されており、円弧部５８１に沿って側壁部５８側の平面部５２近傍が側壁部５７に向かって伸びている。   The side wall 58 is formed in parallel with the side wall 57 as shown in FIG. In the vicinity of the flat surface portion 51 on the side wall portion 58 side, an arc portion 581 is formed as in Example 2, and the vicinity of the flat surface portion 51 on the side wall portion 58 side extends toward the side wall portion 57 along the circular arc portion 581. Yes. In addition, an arc portion 581 is formed in the vicinity of the flat portion 52 on the side wall portion 58 side of the groove portion 56, and the vicinity of the flat portion 52 on the side wall portion 58 side extends toward the side wall portion 57 along the arc portion 581. Yes.

つまり、図１４（ｃ）に示すように、側壁部５８の平面部５１近傍が側壁部５８から連続する伸長部５８２となり、伸長部５８２が側壁部５７に向かって突出し、伸長部５８２の端縁部（端面）５８３が側壁部５７に対向している。そのため、溝部５４の開口部５４１のＷ方向の長さは底面部５５のＷ方向の長さより短くなっている。また、図１４（ｃ）に示すように、側壁部５８の平面部５２近傍が側壁部５８から連続する伸長部５８２となり、伸長部５８２が側壁部５７に向かって突出し、伸長部５８２の端縁部（端面）５８３が側壁部５７に対向している。そのため、溝部５６の開口部５６１のＷ方向の長さは底面部５５のＷ方向の長さより短くなっている。そして、溝部５４、５６内には、例２と同様に、弾性部材２であるコイルスプリング２、２が組み込まれることになる。   That is, as shown in FIG. 14C, the vicinity of the flat portion 51 of the side wall portion 58 becomes an extended portion 582 that continues from the side wall portion 58, and the extended portion 582 protrudes toward the side wall portion 57, and the edge of the extended portion 582 A portion (end surface) 583 faces the side wall portion 57. Therefore, the length in the W direction of the opening 541 of the groove portion 54 is shorter than the length in the W direction of the bottom surface portion 55. Further, as shown in FIG. 14C, the vicinity of the flat portion 52 of the side wall portion 58 becomes an extended portion 582 that continues from the side wall portion 58, and the extended portion 582 protrudes toward the side wall portion 57, and the edge of the extended portion 582 A portion (end surface) 583 faces the side wall portion 57. Therefore, the length in the W direction of the opening 561 of the groove portion 56 is shorter than the length in the W direction of the bottom surface portion 55. In the groove portions 54 and 56, the coil springs 2 and 2 as the elastic members 2 are incorporated in the same manner as in the second example.

具体的には、図１５に示すように、弾性部材２であるコイルスプリング２の端部２２、２３同士を接近させてコイルスプリング２をリング形状にして、図１５に示すように、矢印方向に沿ってコイルスプリング２を移動し、座金５の一方の平面部５２に形成された溝部５６に沿うように組み込んでおり、また、コイルスプリング２の端部２２、２３同士を接近させてコイルスプリング２をリング形状にして、矢印方向に沿ってコイルスプリング２を移動し、座金５の他方の平面部５１に形成された溝部５４に沿うように組み込んでいる。   Specifically, as shown in FIG. 15, the end portions 22 and 23 of the coil spring 2 that is the elastic member 2 are brought close to each other to form the coil spring 2 in a ring shape, and as shown in FIG. The coil spring 2 is moved along the groove portion 56 formed in the one flat portion 52 of the washer 5, and the end portions 22 and 23 of the coil spring 2 are brought close to each other so as to approach the coil spring 2. , And the coil spring 2 is moved along the direction of the arrow, and is assembled along the groove portion 54 formed in the other flat portion 51 of the washer 5.

コイルスプリング２がそれぞれ溝部５４、５６に組み込まれると、図１４（ｃ）に示すように、コイルスプリング２の側面側２１は側壁部５７及び底面部５５に接触し、コイルスプリング２の側壁部５８側は、側壁部５８側へ張り出し、伸長部５８２の端縁部（端面）５８３よりも側壁部５８側へ接近し、側壁部５８側の伸長部５８２の端縁部（端面）５８３にコイルスプリング２の側面側２１が当接することになる。その結果、コイルスプリング２、は溝部５４、５６内に保持されることになり、座金５の一方の平面部５２よりコイルスプリング２の側面部２１の一部が***する（突出する）とともに、座金５の他方の平面部５１よりコイルスプリング２の側面部２１の一部が***する（突出する）ことになる。   When the coil spring 2 is incorporated into the groove portions 54 and 56, respectively, as shown in FIG. 14C, the side surface 21 of the coil spring 2 comes into contact with the side wall portion 57 and the bottom surface portion 55, and the side wall portion 58 of the coil spring 2 is obtained. The side protrudes toward the side wall 58, comes closer to the side wall 58 than the end edge (end surface) 583 of the extended portion 582, and is coiled to the end edge (end surface) 583 of the extended portion 582 on the side wall 58 side. The two side surfaces 21 come into contact with each other. As a result, the coil spring 2 is held in the grooves 54 and 56, and a part of the side surface portion 21 of the coil spring 2 is raised (projects) from the one flat surface portion 52 of the washer 5, and the washer. A part of the side surface portion 21 of the coil spring 2 protrudes (protrudes) from the other flat surface portion 51 of FIG.

以上のようにして、溝部５４、５６内には、例２と同様に、弾性部材２、２としてコイルスプリング２、２が組み込まれることになる。つまり、座金５の平面部５１、５２では、図１４（ｂ）に示すように、対向する溝部５４、５６からコイルスプリング２、２の側面部２１、２１の一部が***する（突出する）ことになる。   As described above, the coil springs 2 and 2 are incorporated in the grooves 54 and 56 as the elastic members 2 and 2 in the same manner as in Example 2. That is, in the flat portions 51 and 52 of the washer 5, as shown in FIG. 14B, part of the side portions 21 and 21 of the coil springs 2 and 2 protrudes (protrudes) from the opposing groove portions 54 and 56. It will be.

以上が本発明である例３に示す緩み防止機構付き結合部材である座金５の構造であり、つぎにこの座金５を用いての被締結部材３、４の締結について説明する。被締結部材３、４の締結については基本的に例２と同一であるので、本発明の作用的な部分を中心に説明する。   The above is the structure of the washer 5 that is the coupling member with the loosening prevention mechanism shown in Example 3 according to the present invention. Next, fastening of the fastened members 3 and 4 using the washer 5 will be described. Since the fastening of the fastened members 3 and 4 is basically the same as in Example 2, the description will focus on the functional part of the present invention.

図１６（ａ）に示すように、板状の被締結部材３、４を重ね合わせて締結するために、被締結部材３、４に予め設けられた、図示しない孔部が重なり合うようにして被締結部材３、４を重ね合わせて図示しない孔部に第一結合部材であるボルト６の雄ねじ部６２を通し、座金５の中心孔５３を通して座金５の平面部５２より***している（突出している）コイルスプリング２の側面部２１の一部を被締結部材３に当接させる。そして、ボルト６の雄ねじ部６２の先端側より第二結合部材であるナット７を螺合させ、ナット７を被締結部材３側へ移動し、図１６（ａ）に示すように、ナット７の底面部７１を座金５の平面部５１より***している（突出している）コイルスプリング２の側面部２１の一部に当接させる。   As shown in FIG. 16 (a), in order to overlap and fasten the plate-like fastened members 3 and 4, the holes to be fastened previously provided in the fastened members 3 and 4 are overlapped. The fastening members 3 and 4 are overlapped and the male threaded portion 62 of the bolt 6 serving as the first coupling member is passed through a hole (not shown), and is projected from the flat portion 52 of the washer 5 through the central hole 53 of the washer 5 (projecting). A part of the side surface portion 21 of the coil spring 2 is brought into contact with the fastened member 3. Then, the nut 7 which is the second connecting member is screwed from the front end side of the male screw portion 62 of the bolt 6, and the nut 7 is moved to the fastened member 3 side. As shown in FIG. The bottom surface portion 71 is brought into contact with a part of the side surface portion 21 of the coil spring 2 protruding (projecting) from the flat surface portion 51 of the washer 5.

このとき、座金５の溝部５４、５６に組み込まれているコイルスプリング２、２の、コイルスプリング２の長手方向を横断する方向（断面方向）の形状は、例２と同様に、断面略円形形状をなしている（図１６（ｂ）参照）。コイルスプリング２、２の側面部２１が溝部５４、５６内の側壁部５７及び底面部５５に接触し、側壁部５８の伸長部５８２の端縁部（端面）５８３に当接し、座金５の平面部５２より***している（突出している）コイルスプリング２の側面部２１の一部が被締結部材３に当接し、座金５の平面部５１より***している（突出している）コイルスプリング２の側面部２１の一部がナット７の底面部７１に当接する。その結果、図１６（ａ）に示すように、座金５の平面部５２側のコイルスプリング２は座金５の溝部５６と被締結部材３との間に挟み込まれ、コイルスプリング２の長手方向を横断する方向（断面方向）からコイルスプリング２の側面部２１に押圧が加わる。また、図１６（ａ）に示すように、座金５の平面部５１側のコイルスプリング２は座金５の溝部５４とナット７の底面部７１との間に挟み込まれ、コイルスプリング２の長手方向を横断する方向（断面方向）からコイルスプリング２の側面部２１に押圧が加わる。   At this time, the shape of the coil springs 2 and 2 incorporated in the grooves 54 and 56 of the washer 5 in the direction (cross-sectional direction) crossing the longitudinal direction of the coil spring 2 is substantially circular in cross-section as in the second example. (See FIG. 16B). The side surface portions 21 of the coil springs 2 and 2 are in contact with the side wall portion 57 and the bottom surface portion 55 in the groove portions 54 and 56, are in contact with the end edge portion (end surface) 583 of the extending portion 582 of the side wall portion 58, and the flat surface of the washer 5. A part of the side surface portion 21 of the coil spring 2 that protrudes (protrudes) from the portion 52 abuts on the fastened member 3 and protrudes (projects) from the flat portion 51 of the washer 5. A part of the side surface portion 21 contacts the bottom surface portion 71 of the nut 7. As a result, as shown in FIG. 16A, the coil spring 2 on the flat portion 52 side of the washer 5 is sandwiched between the groove portion 56 of the washer 5 and the fastened member 3 and crosses the longitudinal direction of the coil spring 2. The pressing is applied to the side surface portion 21 of the coil spring 2 from the direction (cross-sectional direction). 16A, the coil spring 2 on the flat portion 51 side of the washer 5 is sandwiched between the groove portion 54 of the washer 5 and the bottom surface portion 71 of the nut 7, and the longitudinal direction of the coil spring 2 is changed. Pressing is applied to the side surface portion 21 of the coil spring 2 from the crossing direction (cross-sectional direction).

ボルト６の雄ねじ部６２に螺合させたナット７の螺合をさらに進めて、さらにコイルスプリング２、２に押圧を加えることで、コイルスプリング２、２を変形させ、ナット７の底面部７１を座金５の平面部５１に当接させる（図１７（ａ）参照）。その結果、図１７（ｂ）に示すように、例２と同様に、コイルスプリング２の、平面部５１より突出している側面部２１の一部が開口部５４１から溝部５４内に入り込み、コイルスプリング２の側面部２１の側壁部５７及び底面部５５に接触する領域が拡大する。また、コイルスプリング２の、平面部５２より突出している側面部２１の一部が開口部５６１から溝部５６内に入り込み、コイルスプリング２の側面部２１の側壁部５７及び底面部５５に接触する領域が拡大する。さらに、例２と同様に、溝部５４、５６においては、側壁部５８側の、コイルスプリング２の側面部２１が側壁部５８側に移動し、側壁部５８側の、コイルスプリング２の側面部２１が側壁部５８に接触する。ただし、本例のコイルスプリング２と異なる場合には、側壁部５８に接近するにとどまる場合もあり得る。   The nut 7 screwed into the male threaded portion 62 of the bolt 6 is further screwed, and the coil springs 2 and 2 are deformed by further pressing the coil springs 2 and 2 so that the bottom surface portion 71 of the nut 7 is deformed. It is made to contact | abut to the plane part 51 of the washer 5 (refer Fig.17 (a)). As a result, as shown in FIG. 17B, as in Example 2, part of the side surface portion 21 of the coil spring 2 protruding from the flat surface portion 51 enters the groove portion 54 from the opening portion 541, and the coil spring. The area in contact with the side wall portion 57 and the bottom surface portion 55 of the second side surface portion 21 is enlarged. Further, a part of the side surface portion 21 of the coil spring 2 protruding from the flat surface portion 52 enters the groove portion 56 from the opening portion 561 and contacts the side wall portion 57 and the bottom surface portion 55 of the side surface portion 21 of the coil spring 2. Expands. Further, as in Example 2, in the groove portions 54 and 56, the side surface portion 21 of the coil spring 2 on the side wall portion 58 side moves to the side wall portion 58 side, and the side surface portion 21 of the coil spring 2 on the side wall portion 58 side. Contacts the side wall 58. However, if it is different from the coil spring 2 of this example, there may be a case where the side wall 58 is only approached.

さらに、ボルト６の雄ねじ部６２に螺合させたナット７の螺合を進めて、ナット７が回転しなくなるまでナット７を回転させてナット７の底面部７１を座金５上で摺動させることで、ボルト６の頭部６１とナット７とで被締結部材３、４を締結したことになる（図１７（ａ）参照）。このとき、座金５の溝部５４内にコイルスプリング２は収納された状態になり、溝部５４内に収納されたコイルスプリング２の、ボルト６とナット７との螺合による押圧に対する反力がナット７の底面部７１側に加わる（図１７（ｂ）参照）。また、座金５の溝部５６内にコイルスプリング２は収納された状態になり、溝部５６内に収納されたコイルスプリング２の、ボルト６とナット７との螺合による押圧に対する反力が被締結部材３側に加わる（図１７（ｂ）参照）。その結果、その結果、ボルト６とナット７との螺合部に押圧が加わることになり、ボルト６とナット７との螺合部の摩擦力が高まり、被締結部材３、４の締結が完了する。   Further, the nut 7 screwed into the male threaded portion 62 of the bolt 6 is advanced, and the nut 7 is rotated until the nut 7 stops rotating to slide the bottom surface portion 71 of the nut 7 on the washer 5. Thus, the fastened members 3 and 4 are fastened by the head 61 of the bolt 6 and the nut 7 (see FIG. 17A). At this time, the coil spring 2 is housed in the groove portion 54 of the washer 5, and the reaction force against the pressing of the coil spring 2 housed in the groove portion 54 by the screwing of the bolt 6 and the nut 7 is the nut 7. (See FIG. 17B). Further, the coil spring 2 is housed in the groove portion 56 of the washer 5, and the reaction force against the pressing of the coil spring 2 housed in the groove portion 56 by the screwing of the bolt 6 and the nut 7 is a member to be fastened. 3 is added (see FIG. 17B). As a result, pressure is applied to the screwed portion between the bolt 6 and the nut 7, the frictional force of the screwed portion between the bolt 6 and the nut 7 is increased, and the fastening of the fastened members 3 and 4 is completed. To do.

なお、例２及び例３においては、座金５の、一方の平面部５２、他方の平面部５１としているが、必ずしもこのように限定されるものではなく、座金５の、一方の平面部５１、他方の平面部５２とすることも可能である。   In Example 2 and Example 3, the one flat portion 52 and the other flat portion 51 of the washer 5 are used. However, the present invention is not necessarily limited to this, and the one flat portion 51 of the washer 5 The other plane portion 52 may be used.

１…ナット（緩み防止機構付き結合部材）、１１…上面部（他方の平面部）、１２…下面部（一方の平面部）
１３…中心孔、１３１…外周
１４…溝部、１４１…開口部
１５…底面部、１５１、１５２…端縁部、
１６…頂点、１７…側壁部、１７１…端縁部、
１８…側壁部、１８１…円弧部、１８２…伸長部、１８３…端縁部（端面）
１９…外周
２…コイルスプリング（弾性部材）、２１…側面部、２２、２３…端部
３、４…被締結部材、
５…座金（緩み防止機構付き結合部材）、５１…他方の平面部、５２…一方の平面部、５３…中心孔、５４、５６…溝部、５４１、５６１…開口部、
５８…側壁部、５８１…円弧部、５８２…伸長部、５８３…端縁部（端面）
５９…外周
６…ボルト、６１…頭部、６２…雄ねじ部
７…ナット、７１…底面部
Ｗ、Ｗ´…幅 DESCRIPTION OF SYMBOLS 1 ... Nut (coupling member with a loosening prevention mechanism), 11 ... Upper surface part (the other plane part), 12 ... Lower surface part (one plane part)
13 ... center hole 131 ... outer periphery 14 ... groove part 141 ... opening 15 ... bottom face part 151, 152 ... end edge part,
16 ... apex, 17 ... side wall, 171 ... end edge,
18 ... Side wall part, 181 ... Arc part, 182 ... Extension part, 183 ... End edge part (end surface)
DESCRIPTION OF SYMBOLS 19 ... Outer periphery 2 ... Coil spring (elastic member), 21 ... Side part, 22, 23 ... End part 3, 4 ... Fastened member,
DESCRIPTION OF SYMBOLS 5 ... Washer (coupling member with a loosening prevention mechanism), 51 ... Other plane part, 52 ... One plane part, 53 ... Center hole, 54, 56 ... Groove part, 541, 561 ... Opening part,
58 ... side wall part, 581 ... arc part, 582 ... extension part, 583 ... end edge part (end face)
59 ... outer periphery 6 ... bolt, 61 ... head, 62 ... male screw 7 ... nut, 71 ... bottom face W, W '... width

Claims (8)

頭部と該頭部と連続する雄ねじ部とを備えた第一結合部材と、被締結部材を介して対向し、前記第一結合部材とで前記被締結部材を挟み込んで締結するために、前記被締結部材に当接する一方の平面部と、
前記一方の平面部の中央と、前記一方の平面部と対向する他方の平面部の中央とを貫通して軸方向に形成された、前記第一結合部材の、前記被締結部材に形成された孔部を通過した雄ねじ部が入る中心孔と、
前記一方の平面部には、軸方向に沿って、前記一方の平面部から前記他方の平面部に向かって形成され、前記一方の平面部に開口部が形成された溝部と、
前記溝部には、前記溝部の形状に沿って、前記溝部内に組み込まれると、前記一方の平面部の前記開口部から***する弾性部材と、を備えることを特徴とする緩み防止機構付き結合部材。 In order to sandwich and fasten the fastened member by sandwiching the fastened member with the first connecting member having a head and a male screw part continuous with the head and the fastened member, One flat surface portion in contact with the fastened member;
Formed in the fastened member of the first coupling member formed in the axial direction through the center of the one flat surface portion and the center of the other flat surface portion facing the one flat surface portion. A central hole into which the male screw part that has passed through the hole enters;
In the one plane portion, along the axial direction, the groove portion is formed from the one plane portion toward the other plane portion, and an opening is formed in the one plane portion;
A coupling member with a loosening prevention mechanism, characterized in that the groove portion includes an elastic member that protrudes from the opening portion of the one flat surface portion when incorporated in the groove portion along the shape of the groove portion. . 前記中心孔には、前記第一結合部材の前記雄ねじ部と螺合する雌ねじ部が形成されており、前記中心孔の前記雌ねじ部と前記第一結合部材の前記雄ねじ部とが螺合することにより、前記一方の平面部の前記溝部に組み込まれた前記弾性部材が前記被締結部材に当接することを特徴とする請求項１に記載の緩み防止機構付き結合部材。   The center hole is formed with a female screw portion that is screwed with the male screw portion of the first coupling member, and the female screw portion of the center hole and the male screw portion of the first coupling member are screwed together. 2. The coupling member with a loosening prevention mechanism according to claim 1, wherein the elastic member incorporated in the groove portion of the one planar portion abuts on the fastened member. 前記溝部は、前記被締結部材に当接する前記一方の平面部に、前記中心孔と同心状に形成されていることを特徴とする請求項１又は２に記載の緩み防止機構付き結合部材。   3. The coupling member with a loosening prevention mechanism according to claim 1, wherein the groove portion is formed concentrically with the center hole in the one flat portion that contacts the fastened member. 前記溝部は、前記一方の平面部と反対側の前記他方の平面部にも形成されており、前記他方の平面部に形成された前記溝部は、軸方向に沿って、前記他方の平面部から前記一方の平面部に向かって形成され、前記他方の平面部に開口部が形成され、
前記一方の平面部に形成された前記溝部と径が同一であることが含まれることを特徴とする請求項１又は３に記載の緩み防止機構付き結合部材。 The groove portion is also formed on the other plane portion opposite to the one plane portion, and the groove portion formed on the other plane portion extends from the other plane portion along the axial direction. Formed toward the one flat surface, an opening is formed in the other flat surface,
4. The coupling member with a loosening prevention mechanism according to claim 1, wherein a diameter of the groove formed in the one flat portion is the same. 5. 前記他方の平面部に形成された前記溝部には、前記溝部の形状に沿って、前記溝部内に組み込まれると、前記他方の平面部の前記開口部から***する弾性部材と、を備えることを特徴とする請求項４に記載の緩み防止機構付き結合部材。   The groove portion formed in the other flat surface portion includes an elastic member that protrudes from the opening of the other flat surface portion when incorporated in the groove portion along the shape of the groove portion. The coupling member with a loosening prevention mechanism according to claim 4. 前記第一結合部材と前記被締結部材に対向し、前記被締結部材と第二結合部材とに挟み込まれ、前記第一結合部材と前記第二結合部材とにより前記被締結部材を締結すると、前記一方の平面部の前記溝部に組み込まれた前記弾性部材が前記被締結部材に当接し、前記他方の平面部の前記溝部に組み込まれた前記弾性部材が前記第二結合部材に当接することを特徴とする請求項５に記載の緩み防止機構付き結合部材。   The first coupling member and the fastened member are opposed to each other, sandwiched between the fastened member and the second joint member, and when the fastened member is fastened by the first joint member and the second joint member, The elastic member incorporated in the groove portion of one flat surface portion abuts on the fastened member, and the elastic member incorporated in the groove portion of the other flat surface portion abuts on the second coupling member. The coupling member with a loosening prevention mechanism according to claim 5. 前記溝部は、軸方向に沿って形成された、対向する側壁部と、対向する前記側壁部と連続して、前記側壁部と交差する方向に形成された底面部とからなり、前記底面部と対向する側である前記平面部側には前記開口部が形成され、
対向する前記側壁部の内、外周側の前記側壁部の、前記開口部側の先端側が前記中心孔側の前記側壁部側に伸びる伸長部が形成されていることを特徴とする請求項１乃至６いずれかに記載の緩み防止機構付き結合部材。 The groove portion includes an opposing side wall portion formed along the axial direction, and a bottom surface portion formed in a direction intersecting with the side wall portion continuously with the opposing side wall portion. The opening is formed on the side of the flat surface which is the opposite side,
The extension part which the front end side of the said opening part side of the said side wall part of the outer peripheral side of the said opposing side wall part extends in the said side wall part side by the said center hole side is formed. 6. A coupling member with a loosening prevention mechanism according to any one of 6 above. 前記溝部に前記弾性部材を組み込むと、前記外周側の前記側壁部に形成された前記伸長部の端縁部が前記弾性部材に当接し、前記弾性部材は前記溝部で保持され、前記弾性部材は前記平面部より***することを特徴とする請求項７に記載の緩み防止機構付き結合部材。   When the elastic member is incorporated in the groove portion, an end edge portion of the extending portion formed on the side wall portion on the outer peripheral side comes into contact with the elastic member, the elastic member is held by the groove portion, and the elastic member is The coupling member with a loosening prevention mechanism according to claim 7, wherein the coupling member protrudes from the flat portion.
JP2009197231A 2009-08-27 2009-08-27 Coupling member with looseness preventive mechanism Pending JP2011047482A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014070699A (en) * 2012-09-28 2014-04-21 Hokkaido Electric Power Co Inc:The Oil leakage prevention washer, oil leakage prevention structure and oil leakage prevention method
JP2014070735A (en) * 2013-08-09 2014-04-21 Hokkaido Electric Power Co Inc:The Liquid leakage prevention nut, liquid leakage prevention structure and liquid leakage prevention method
RU209941U1 (en) * 2021-08-04 2022-03-24 Публичное акционерное общество "КАМАЗ" Retainer

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51160762U (en) * 1975-06-16 1976-12-21
JPS56117113U (en) * 1980-02-09 1981-09-08
JPS57192614A (en) * 1981-05-22 1982-11-26 Shiyouhei Yajima Nut with locking

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51160762U (en) * 1975-06-16 1976-12-21
JPS56117113U (en) * 1980-02-09 1981-09-08
JPS57192614A (en) * 1981-05-22 1982-11-26 Shiyouhei Yajima Nut with locking

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014070699A (en) * 2012-09-28 2014-04-21 Hokkaido Electric Power Co Inc:The Oil leakage prevention washer, oil leakage prevention structure and oil leakage prevention method
JP2014070735A (en) * 2013-08-09 2014-04-21 Hokkaido Electric Power Co Inc:The Liquid leakage prevention nut, liquid leakage prevention structure and liquid leakage prevention method
RU209941U1 (en) * 2021-08-04 2022-03-24 Публичное акционерное общество "КАМАЗ" Retainer

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