WO2010092669A1 - Nut removal prevention device - Google Patents

Nut removal prevention device Download PDF

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Publication number
WO2010092669A1
WO2010092669A1 PCT/JP2009/052236 JP2009052236W WO2010092669A1 WO 2010092669 A1 WO2010092669 A1 WO 2010092669A1 JP 2009052236 W JP2009052236 W JP 2009052236W WO 2010092669 A1 WO2010092669 A1 WO 2010092669A1
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WO
WIPO (PCT)
Prior art keywords
nut
insertion hole
removal
section
shape
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PCT/JP2009/052236
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French (fr)
Japanese (ja)
Inventor
伊藤勝夫
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イイファス株式会社
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Priority to JP2010550366A priority Critical patent/JPWO2010092669A1/en
Priority to PCT/JP2009/052236 priority patent/WO2010092669A1/en
Publication of WO2010092669A1 publication Critical patent/WO2010092669A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B37/00—Nuts or like thread-engaging members
    • F16B37/14—Cap nuts; Nut caps or bolt caps

Definitions

  • the present invention relates to a nut removal prevention tool for preventing removal of a nut fastened to a bolt or the like.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2004-340355 discloses a cap washer having a capacity internal space covering a nut or bolt head, and a support washer having a protrusion raised from the inner periphery of a through hole at the center of a seating surface.
  • Patent Document 1 A removal preventing fastening device composed of a body has been proposed.
  • the seat surface of the nut is supported only by the protrusion raised from the support washer body. For this reason, depending on the shape of the seating surface, the nut may not be stably supported. Further, if the nut is strongly tightened, the protrusions are crushed, and there is a possibility that the latching claw of the cap body cannot be latched on the lower surface of the nut, so there is a problem that the nut cannot be tightened strongly.
  • the present invention has been made to solve such problems, and maintains high strength without adopting a complicated configuration and is low in manufacturing cost.
  • the present invention depends on the dimensional tolerance of the nut and the seat surface shape. It is an object of the present invention to provide a nut removal preventer that can be attached without being tightened and that can secure a state in which the nut is firmly tightened, making it difficult to remove and improving security.
  • a feature of the nut removal prevention device is a nut removal prevention device for preventing the removal of the nut, which is formed in a substantially truncated cone shape, and a male screw portion such as a bolt is inserted substantially in the center.
  • a grip prevention portion having a possible insertion hole, a hollow housing portion formed in a substantially circular concave shape around the insertion hole on the lower surface of the grip prevention portion and having a capacity capable of housing the nut, and the grip prevention portion It protrudes thinly along the peripheral edge of the insertion hole on the upper surface of the screw, and has a caulking portion that can be caulked to the inserted male screw portion side.
  • a substantially circular concave flange-shaped housing portion that is an outer periphery of the hollow housing portion and is continuous with the hollow housing portion may be formed on the lower surface of the grip prevention portion.
  • the manufacturing cost is low, and it is stably attached without being affected by the dimensional tolerance or the seat surface shape of the nut, and the nut is firmly tightened. It is possible to improve the security by making it difficult to remove while securing the state.
  • FIG. 1 It is a perspective view which shows one Embodiment of the nut removal prevention tool which concerns on this invention. It is sectional drawing which cut
  • FIG. 1 is a perspective view showing a nut removal preventing tool 1 of the present embodiment
  • FIG. 2 is a cross-sectional view of the nut removal preventing tool 1 cut at a central position in plan view.
  • the nut removal preventing tool 1 of the present embodiment is placed on a tightened nut N to prevent the removal, and as shown in FIGS. 1 and 2, the grip prevention formed mainly in a substantially truncated cone shape.
  • Part 2 hollow housing part 3 formed on the lower surface side of grip prevention part 2, caulking part 4 protruding on the upper surface side of grip prevention part 2, flange part of washer W and nut N with flange, etc. It has a flange-shaped storage portion 5 that can be stored.
  • the grip prevention part 2 plays a role of preventing gripping by a fastening tool such as a spanner, and is formed in a substantially truncated cone shape. Further, as shown in FIGS. 1 and 2, an insertion hole 21 through which a male screw part B such as a bolt can be inserted is provided substantially at the center of the grip prevention part.
  • the outer peripheral side surface of the grip prevention portion 2 is formed in a tapered shape, but the present invention is not limited to this, and a shape that is difficult to grip with a general tool is formed in a curved shape. May be.
  • the male screw portion B includes all those that are formed in a rod shape or a cylindrical shape, such as bolts, and that have a male screw on the outer peripheral surface.
  • the hollow housing part 3 houses and hides the nut N that is to be prevented from being removed.
  • the hollow housing portion 3 is formed in a substantially circular concave shape around the insertion hole 21 in the lower surface of the grip prevention portion 2 as shown in FIG. Therefore, the grip prevention part 2 is configured to communicate with the hollow housing part 3 through the insertion hole 21 from the upper surface. Further, the hollow housing portion 3 is formed to have a capacity capable of housing at least the nut N.
  • the inner peripheral surface 31 of the hollow housing portion 3 is formed to have an inner diameter larger than the maximum dimension of the nut N to be prevented from being removed, and the diagonal distance of the nut N and the dimensional tolerance of the two-surface width. It can be stored corresponding to. Further, a tapered surface 32 is formed on the upper peripheral edge of the hollow housing portion 3 so that it can be housed corresponding to the tolerance of the height dimension of the nut N. In addition, it is practical to form the hollow accommodating portion 3 in a substantially circular concave shape from the viewpoint of ease of manufacture and versatility that can correspond to various shapes of the nuts N, but in the case where there are similar effects May be formed in another concave shape.
  • the caulking portion 4 is caulked to the male screw portion B side, bites into the male screw, and plays a role of holding the nut removal preventing tool 1 on the nut N.
  • the caulking portion 4 is formed so as to protrude in a thin shape along the periphery of the insertion hole 21 on the upper surface of the grip prevention portion 2 as shown in FIGS. 1 and 2.
  • the caulking portion 4 is formed in a ring shape in plan view, but is not limited to this shape. Specifically, as will be described later, when a pressing force inward and downward with respect to the axial direction is applied to the caulking portion 4, the convex portion that deforms inward and is caulked into the male screw portion B side. Any shape can be used as long as it is present. If the caulking portion 4 is not formed in a convex shape, it may not be able to be screwed into the male screw simply by being depressed.
  • the nut removal prevention tool 1 of this embodiment can be manufactured from various materials, such as iron, stainless steel, aluminum, zinc die-casting, and resin, the size and shape of the caulking portion 4 are set according to the characteristics of these materials. It is preferable to design. Further, it is preferable to select a workability of a tool used for caulking work and a shape having good durability due to repeated use.
  • the flange-shaped accommodation part 5 is for accommodating the washer W used with the nut N and a flange part (not shown) of a nut with a flange.
  • the flange-shaped accommodating portion 5 is provided on the lower surface of the grip preventing portion 2, and has a substantially circular concave shape on the outer periphery of the hollow accommodating portion 3, and is continuous with the hollow accommodating portion 3 in a flange shape. It is formed to do.
  • the flange-shaped accommodation part 5 is formed in the substantially circular concave shape provided with the magnitude
  • the nut removal preventing tool 1 of the present embodiment can also be applied to the case where a nut with a flange or the like is used or the washer W is not used.
  • the flange-shaped accommodating part 5 itself does not need to be provided.
  • the washer W is inserted into the male screw portion B inserted into the fastening object X and the fastened object Y, and then the nut N is screwed. Tighten firmly. At this time, the male screw portion B needs to protrude from the fastener X more than the height of the nut removal preventing tool 1.
  • the nut removal preventing tool 1 of the present embodiment is covered from above the tightened nut N.
  • the male screw portion B is inserted into the insertion hole 21 and protruded from the upper surface of the nut removal preventing tool 1.
  • the hollow accommodating portion 3 accommodates the nut N without being influenced by the diagonal distance of the nut N or the dimensional tolerance of the two-surface width, and the tapered surface 32 is related to the dimensional tolerance of the nut N in the height direction. Since the nut N is accommodated, the covering operation is easy and the nut N can be completely hidden.
  • the flange-shaped accommodating part 5 accommodates the washer W and the flange part, it can be used in both cases where the washer W and the nut with the flange are used and when not used. Excellent versatility.
  • the attachment tool 6 is brought into contact with the caulking portion 4 and driven by a hammer or the like (not shown).
  • the attachment tool 6 of the present embodiment is formed in a substantially cylindrical shape, and the inner diameter thereof is configured to allow the male screw portion B to be loosely fitted.
  • three caulking claws 61 for applying a pressing force to the caulking portion 4 are provided at the front end portion of the attachment tool 6 at equal angular intervals in the circumferential direction. As shown in FIG. 3, each caulking claw 61 is bent inward, and its tip surface is inclined downward from the inside to the outside, and its tip substantially coincides with the outer peripheral edge of the caulking portion 4. Dimension is formed.
  • each caulking claw 61 When the mounting tool 6 having the above-described configuration is inserted into the male screw portion B protruding from the insertion hole 21, the tip of each caulking claw 61 comes into contact with the upper surface of the caulking portion 4 as shown in FIG. When the rear end portion of the attachment tool 6 is driven with a hammer or the like (not shown), each caulking claw 61 applies an inward and downward pressing force to the caulking portion 4.
  • the three portions of the ring-shaped caulking portion 4 that are in contact with the caulking claws 61 are plastically deformed so as to be inclined inward, and deeply bite into the male screw portion B as shown in FIG.
  • the nut removal preventing tool 1 is caulked to the male screw portion B and cannot be easily removed.
  • the grip prevention part 2 is formed in a substantially truncated cone shape, it cannot be gripped by a general tool such as a spanner and is easily rotated. There is nothing. Moreover, even if the grip prevention part 2 is rotated, since the rotational force is not transmitted to the nut N in the hollow housing part 3, it is not loosened.
  • the removal of the nut N can be prevented with high reliability. 2. It can be made of high strength material and is not easily destroyed. 3. It is not affected by the dimensional tolerance of the nut N, and the labor and time required for the mounting work can be reduced. 4). Regardless of the shape of the seating surface of the nut N, it can be securely attached. 5). It can be attached with or without a washer W or a flange. 6). Since it is attached to the nut N that is firmly tightened, a strong fastening force can be secured. 7). Since it has a simple structure, it can be manufactured with various materials according to the application, and the manufacturing cost can be reduced. 8). There is a practical effect that it can be easily attached not only to the newly-fastened nut N but also to an existing nut N already fastened on site.
  • the nut removal prevention tool 1 which concerns on this invention is not limited to embodiment mentioned above, It can change suitably.
  • the caulking portions 4 are formed in a ring shape, but the present invention is not limited to this, and a plurality of caulking portions 4 are arranged at predetermined angular intervals along the periphery of the insertion hole 21. You may make it project.
  • the attachment tool 6 which has the three crimping claws 61 is used, it is not restricted to this, The ring-shaped crimping nail

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dowels (AREA)
  • Bolts, Nuts, And Washers (AREA)

Abstract

A nut removal prevention device has high strength achieved without using a complex structure, can be manufactured at low cost, can be mounted irrespective of dimensional tolerance of a nut and the shape of a seat surface, can hold the nut in a firmly tightened state, and has enhanced security by making removal of the nut difficult. The nut removal prevention device (1) for preventing the nut (N) from being removed has a holding prevention section (2) which is formed in a substantially truncated cone shape and which has an insertion hole (21) formed at substantially the center of the holding prevention section (2) and allowing a male screw section (B) of a bolt to be inserted through the insertion hole (21), a hollow containing section (3) which is formed in the lower surface of the holding prevention section (2), has a substantially circular recessed shape located around the insertion hole (21), and has a volume capable of housing the nut (N), and a staking section (4) which projects in a thin plate shape from the upper surface of the holding prevention section (2) so as to extend along the circumferential edge of the insertion hole (21) and which can be staked toward the male screw (B) inserted.

Description

ナット取り外し防止具Nut removal prevention tool
　本発明は、ボルト等に締結したナットの取り外しを防止するためのナット取り外し防止具に関するものである。 The present invention relates to a nut removal prevention tool for preventing removal of a nut fastened to a bolt or the like.
　従来、締め付けたナットの取り外しを防止するための技術が提案されている。例えば、特開２００４－３４０３５５号公報には、ナットまたはボルト頭部を覆う容量の内部空間を有するキャップ体と、座面中央部の貫通穴の内周部から立ち上がらせた突部を有する支持ワッシャ体とから構成される取り外し防止締結装置が提案されている（特許文献１）。 Conventionally, a technique for preventing the removal of a tightened nut has been proposed. For example, Japanese Patent Application Laid-Open No. 2004-340355 discloses a cap washer having a capacity internal space covering a nut or bolt head, and a support washer having a protrusion raised from the inner periphery of a through hole at the center of a seating surface. A removal preventing fastening device composed of a body has been proposed (Patent Document 1).
特開２００４－３４０３５５号公報JP 2004-340355 A
　しかしながら、上記特許文献１に記載された発明においては、支持ワッシャ体から立ち上げた突部だけでナットの座面を支持するように構成されている。このため、座面の形状によっては、ナットを安定的に支持することができないおそれがある。また、ナットを強く締め付けると当該突部が潰れてしまい、キャップ体の掛止めツメをナットの下面に掛け止められなくなってしまうおそれがあるので、強く締め付けられないという問題がある。 However, in the invention described in Patent Document 1, the seat surface of the nut is supported only by the protrusion raised from the support washer body. For this reason, depending on the shape of the seating surface, the nut may not be stably supported. Further, if the nut is strongly tightened, the protrusions are crushed, and there is a possibility that the latching claw of the cap body cannot be latched on the lower surface of the nut, so there is a problem that the nut cannot be tightened strongly.
　また、上記特許文献１に記載された発明においては、キャップ体をナットの上部から押し込んでナットの下面に掛け止める際、ナットの側面に沿って掛止めツメを折り曲げ得る程度の弾性を必要とするため、強度の高い素材を使用できない。さらに、割れ溝が形成されているためキャップ体自体の強度はそれ程大きくはなく、悪意のある者によって簡単に破壊されてしまうおそれがあり、取り外し防止のセキュリティー効果は高くない。 Moreover, in the invention described in the above-mentioned Patent Document 1, when the cap body is pushed from the upper part of the nut and hooked on the lower surface of the nut, the elasticity required to be able to bend the latching claw along the side surface of the nut is required. Therefore, high strength materials cannot be used. Furthermore, since the crack groove is formed, the strength of the cap body itself is not so great, and it may be easily broken by a malicious person, and the security effect for preventing the removal is not high.
　さらに、上記特許文献１に記載された発明においては、そもそも部品数が多くて複雑な構成であるため、取り付け作業に手間と時間がかかってしまうという作業上の問題がある。もとより製造コストの面でも実用性に乏しい。また、ナットには、通常、高さ、対角距離および二面幅において寸法公差があるところ、この寸法公差に対応するための構成については特段に配慮されておらず、許容範囲が狭い。 Furthermore, in the invention described in the above-mentioned Patent Document 1, since the number of components is large and the structure is complicated, there is a problem in work that installation work takes time and effort. Of course, it is not practical in terms of manufacturing cost. Also, nuts usually have dimensional tolerances in height, diagonal distance, and width across flats. However, no special consideration is given to the configuration for dealing with the dimensional tolerances, and the allowable range is narrow.
　本発明は、このような問題点を解決するためになされたものであって、複雑な構成を採用することなく高い強度を保持して製造コストが安く、ナットの寸法公差や座面形状に左右されることなく取り付けられ、ナットを強固に締め付けた状態を確保しつつ取り外しを困難にしてセキュリティー性を高めることができるナット取り外し防止具を提供することを目的としている。 The present invention has been made to solve such problems, and maintains high strength without adopting a complicated configuration and is low in manufacturing cost. The present invention depends on the dimensional tolerance of the nut and the seat surface shape. It is an object of the present invention to provide a nut removal preventer that can be attached without being tightened and that can secure a state in which the nut is firmly tightened, making it difficult to remove and improving security.
　本発明に係るナット取り外し防止具の特徴は、ナットの取り外しを防止するためのナット取り外し防止具であって、略円錐台形状に形成されているとともに、略中央にボルト等の雄ネジ部を挿通可能な挿通孔を備えた把持防止部と、この把持防止部の下面における前記挿通孔の周りに略円形凹状に形成されて前記ナットを収容可能な容量を有する中空収容部と、前記把持防止部の上面における挿通孔の周縁に沿って薄肉状に突出されており、挿通された雄ネジ部側にかしめることが可能なかしめ部とを有している。 A feature of the nut removal prevention device according to the present invention is a nut removal prevention device for preventing the removal of the nut, which is formed in a substantially truncated cone shape, and a male screw portion such as a bolt is inserted substantially in the center. A grip prevention portion having a possible insertion hole, a hollow housing portion formed in a substantially circular concave shape around the insertion hole on the lower surface of the grip prevention portion and having a capacity capable of housing the nut, and the grip prevention portion It protrudes thinly along the peripheral edge of the insertion hole on the upper surface of the screw, and has a caulking portion that can be caulked to the inserted male screw portion side.
　また、本発明において、前記把持防止部の下面には、前記中空収容部の外周であって、当該中空収容部に連続する略円形凹状のフランジ状収容部が形成されていてもよい。 Further, in the present invention, a substantially circular concave flange-shaped housing portion that is an outer periphery of the hollow housing portion and is continuous with the hollow housing portion may be formed on the lower surface of the grip prevention portion.
　本発明によれば、複雑な構成を採用することなく高い強度を保持して製造コストが安く、ナットの寸法公差や座面形状に左右されることなく安定的に取り付けられ、ナットを強固に締め付けた状態を確保しつつ取り外しを困難にしてセキュリティー性を高めることができる。 According to the present invention, high strength is maintained without adopting a complicated configuration, the manufacturing cost is low, and it is stably attached without being affected by the dimensional tolerance or the seat surface shape of the nut, and the nut is firmly tightened. It is possible to improve the security by making it difficult to remove while securing the state.
本発明に係るナット取り外し防止具の一実施形態を示す斜視図である。It is a perspective view which shows one Embodiment of the nut removal prevention tool which concerns on this invention. 本実施形態のナット取り外し防止具を平面視中央位置で切断した断面図である。It is sectional drawing which cut | disconnected the nut removal prevention tool of this embodiment in planar view center position. 本実施形態のナット取り外し防止具を取り付ける際の正面図である。It is a front view at the time of attaching the nut removal prevention tool of this embodiment. 本実施形態のナット取り外し防止具を取り付けた状態を示す一部断面図である。It is a partial cross section figure which shows the state which attached the nut removal prevention tool of this embodiment.
発明を実施するための形態BEST MODE FOR CARRYING OUT THE INVENTION
　以下、本発明に係るナット取り外し防止具１の実施形態について図面を用いて説明する。図１は、本実施形態のナット取り外し防止具１を示す斜視図であり、図２は、ナット取り外し防止具１の平面視中央位置で切断した断面図である。 Hereinafter, embodiments of the nut removal preventing tool 1 according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a nut removal preventing tool 1 of the present embodiment, and FIG. 2 is a cross-sectional view of the nut removal preventing tool 1 cut at a central position in plan view.
　本実施形態のナット取り外し防止具１は、締め付けたナットＮに被せられ、その取り外しを防止するものであり、図１および図２に示すように、主として、略円錐台形状に形成された把持防止部２と、この把持防止部２の下面側に形成された中空収容部３と、把持防止部２の上面側に突出されたかしめ部４と、ワッシャーＷやフランジ付きナットＮのフランジ部等を収容可能なフランジ状収容部５とを有している。以下、各構成部についてより詳細に説明する。 The nut removal preventing tool 1 of the present embodiment is placed on a tightened nut N to prevent the removal, and as shown in FIGS. 1 and 2, the grip prevention formed mainly in a substantially truncated cone shape. Part 2, hollow housing part 3 formed on the lower surface side of grip prevention part 2, caulking part 4 protruding on the upper surface side of grip prevention part 2, flange part of washer W and nut N with flange, etc. It has a flange-shaped storage portion 5 that can be stored. Hereinafter, each component will be described in more detail.
　把持防止部２は、スパナ等の締結用工具によって把持されるのを防止する役割を果たすものであり、略円錐台形状に形成されている。また、把持防止部の略中央には、図１および図２に示すように、ボルト等の雄ネジ部Ｂを挿通可能な挿通孔２１が設けられている。なお、本実施形態では、把持防止部２の外周側面をテーパ状に形成しているが、これに限られるものではなく、一般的な工具によって把持し難い形状であれば、曲面状に形成してもよい。また、本発明において、雄ネジ部Ｂとは、ボルト等のように、棒状または筒状に形成され、外周面に雄ネジを有している全てのものを含む。 The grip prevention part 2 plays a role of preventing gripping by a fastening tool such as a spanner, and is formed in a substantially truncated cone shape. Further, as shown in FIGS. 1 and 2, an insertion hole 21 through which a male screw part B such as a bolt can be inserted is provided substantially at the center of the grip prevention part. In the present embodiment, the outer peripheral side surface of the grip prevention portion 2 is formed in a tapered shape, but the present invention is not limited to this, and a shape that is difficult to grip with a general tool is formed in a curved shape. May be. Further, in the present invention, the male screw portion B includes all those that are formed in a rod shape or a cylindrical shape, such as bolts, and that have a male screw on the outer peripheral surface.
　中空収容部３は、取り外しを防止しようとするナットＮを収容し、隠してしまうものである。本実施形態において、中空収容部３は、図２に示すように、把持防止部２の下面における挿通孔２１の周りに略円形凹状に形成されている。よって、把持防止部２の上面から挿通孔２１を介して中空収容部３へと連通するように構成されている。また、中空収容部３は、少なくともナットＮを収容可能な容量を有するように形成されている。 The hollow housing part 3 houses and hides the nut N that is to be prevented from being removed. In the present embodiment, the hollow housing portion 3 is formed in a substantially circular concave shape around the insertion hole 21 in the lower surface of the grip prevention portion 2 as shown in FIG. Therefore, the grip prevention part 2 is configured to communicate with the hollow housing part 3 through the insertion hole 21 from the upper surface. Further, the hollow housing portion 3 is formed to have a capacity capable of housing at least the nut N.
　本実施形態において、中空収容部３の内周面３１は、取り外しを防止しようとするナットＮの最大寸法よりも大きい内径に形成されており、ナットＮの対角距離や二面幅の寸法公差に対応して収納できるように構成されている。また、中空収容部３の上方周縁部にはテーパ面３２が形成されており、ナットＮの高さ寸法の公差に対応して収納できるように構成されている。なお、中空収容部３は、製造の容易性や各種のナットＮの形状に対応できる汎用性の観点から、略円形凹部状に形成することが実用的であるが、同様な作用効果を奏する場合には他の凹部状に形成してもよい。 In the present embodiment, the inner peripheral surface 31 of the hollow housing portion 3 is formed to have an inner diameter larger than the maximum dimension of the nut N to be prevented from being removed, and the diagonal distance of the nut N and the dimensional tolerance of the two-surface width. It can be stored corresponding to. Further, a tapered surface 32 is formed on the upper peripheral edge of the hollow housing portion 3 so that it can be housed corresponding to the tolerance of the height dimension of the nut N. In addition, it is practical to form the hollow accommodating portion 3 in a substantially circular concave shape from the viewpoint of ease of manufacture and versatility that can correspond to various shapes of the nuts N, but in the case where there are similar effects May be formed in another concave shape.
　かしめ部４は、雄ネジ部Ｂ側にかしめられて雄ネジに食い込み、ナット取り外し防止具１をナットＮに掛け止める役割を果たすものである。本実施形態において、かしめ部４は、図１および図２に示すように、把持防止部２の上面における挿通孔２１の周縁に沿って薄肉状に突出形成されている。 The caulking portion 4 is caulked to the male screw portion B side, bites into the male screw, and plays a role of holding the nut removal preventing tool 1 on the nut N. In the present embodiment, the caulking portion 4 is formed so as to protrude in a thin shape along the periphery of the insertion hole 21 on the upper surface of the grip prevention portion 2 as shown in FIGS. 1 and 2.
　なお、本実施形態において、かしめ部４は平面視でリング状に形成されているが、この形状に限られるものではない。具体的には、後述するように、軸線方向に対して内方下向きの押圧力がかしめ部４に付与されたとき、内方に変形して雄ネジ部Ｂ側にかしめられて食い込む凸状部さえあれば、どのような形状であってもよい。なお、かしめ部４が凸状に形成されていない場合には、陥没するだけで雄ネジに螺合できないことがある。 In the present embodiment, the caulking portion 4 is formed in a ring shape in plan view, but is not limited to this shape. Specifically, as will be described later, when a pressing force inward and downward with respect to the axial direction is applied to the caulking portion 4, the convex portion that deforms inward and is caulked into the male screw portion B side. Any shape can be used as long as it is present. If the caulking portion 4 is not formed in a convex shape, it may not be able to be screwed into the male screw simply by being depressed.
　また、本実施形態のナット取り外し防止具１は、鉄、ステンレス、アルミニウム、亜鉛ダイキャスト、樹脂等の各種材料から製造できるため、それらの材料の特性に応じて、かしめ部４の大きさや形状を設計することが好ましい。さらには、かしめ作業に使用される工具の加工性や繰り返し使用されることによる耐久性のよい形状を選択することが好ましい。 Moreover, since the nut removal prevention tool 1 of this embodiment can be manufactured from various materials, such as iron, stainless steel, aluminum, zinc die-casting, and resin, the size and shape of the caulking portion 4 are set according to the characteristics of these materials. It is preferable to design. Further, it is preferable to select a workability of a tool used for caulking work and a shape having good durability due to repeated use.
　フランジ状収容部５は、ナットＮと共に用いるワッシャーＷや、フランジ付きナットのフランジ部（図示せず）を収容するためのものである。本実施形態において、フランジ状収容部５は、把持防止部２の下面に設けられ、中空収容部３の外周にこれよりも大きな略円形凹状であって、当該中空収容部３にフランジ状に連続するように形成されている。また、フランジ状収容部５は、ワッシャーＷやフランジ付きナットのフランジ部を収容しうる大きさと高さを備えた略円形凹状に形成されている。 The flange-shaped accommodation part 5 is for accommodating the washer W used with the nut N and a flange part (not shown) of a nut with a flange. In the present embodiment, the flange-shaped accommodating portion 5 is provided on the lower surface of the grip preventing portion 2, and has a substantially circular concave shape on the outer periphery of the hollow accommodating portion 3, and is continuous with the hollow accommodating portion 3 in a flange shape. It is formed to do. Moreover, the flange-shaped accommodation part 5 is formed in the substantially circular concave shape provided with the magnitude | size and height which can accommodate the washer W and the flange part of a nut with a flange.
　なお、本実施形態では、ナットＮと締結物Ｘとの間にワッシャーＷを使用することを想定し、ナット取り外し防止具１にフランジ状収容部５を形成している。しかしながら、本実施形態のナット取り外し防止具１は、フランジ付きナット等を使用する場合や、ワッシャーＷを使用しない場合にも適用できる。また、ワッシャーＷやフランジ付きナットを使用しない場合には、フランジ状収容部５自体を設けなくてもよい。 In the present embodiment, it is assumed that a washer W is used between the nut N and the fastener X, and the flange-shaped accommodation portion 5 is formed in the nut removal preventing tool 1. However, the nut removal preventing tool 1 of the present embodiment can also be applied to the case where a nut with a flange or the like is used or the washer W is not used. Moreover, when not using the washer W and the nut with a flange, the flange-shaped accommodating part 5 itself does not need to be provided.
　つぎに、以上の構成を備えた本実施形態におけるナット取り外し防止具１の作用につき、図面を参照しつつ説明する。 Next, the operation of the nut removal preventing tool 1 in the present embodiment having the above configuration will be described with reference to the drawings.
　本実施形態のナット取り外し防止具１によってナットＮの取り外しを防止する場合、まず、締結物Ｘおよび被締結物Ｙに挿通された雄ネジ部ＢにワッシャーＷを挿通させた後、ナットＮを螺合し強固に締め付ける。このとき、雄ネジ部Ｂは、ナット取り外し防止具１の高さ以上に締結物Ｘから突出されていることを要する。 In order to prevent the nut N from being removed by the nut removal preventing tool 1 of the present embodiment, first, the washer W is inserted into the male screw portion B inserted into the fastening object X and the fastened object Y, and then the nut N is screwed. Tighten firmly. At this time, the male screw portion B needs to protrude from the fastener X more than the height of the nut removal preventing tool 1.
　つぎに、図３に示すように、締め付けたナットＮの上方から、本実施形態のナット取り外し防止具１を覆い被せる。このとき、雄ネジ部Ｂを挿通孔２１に挿通させ、ナット取り外し防止具１の上面から突出させる。また、中空収容部３は、ナットＮの対角距離や二面幅の寸法公差に左右されることなくナットＮを収容するとともに、テーパ面３２が、ナットＮの高さ方向の寸法公差に関係なくナットＮを収容するため、被覆作業がしやすく、ナットＮを完全に隠すことができる。さらに、本実施形態では、フランジ状収容部５が、ワッシャーＷやフランジ部を収容するため、ワッシャーＷやフランジ付きナットを使用する場合および使用しない場合のいずれの場合にも使用することができ、汎用性に優れている。 Next, as shown in FIG. 3, the nut removal preventing tool 1 of the present embodiment is covered from above the tightened nut N. At this time, the male screw portion B is inserted into the insertion hole 21 and protruded from the upper surface of the nut removal preventing tool 1. Further, the hollow accommodating portion 3 accommodates the nut N without being influenced by the diagonal distance of the nut N or the dimensional tolerance of the two-surface width, and the tapered surface 32 is related to the dimensional tolerance of the nut N in the height direction. Since the nut N is accommodated, the covering operation is easy and the nut N can be completely hidden. Furthermore, in this embodiment, since the flange-shaped accommodating part 5 accommodates the washer W and the flange part, it can be used in both cases where the washer W and the nut with the flange are used and when not used. Excellent versatility.
　つづいて、図３に示すように、取り付け工具６をかしめ部４に当接させて、ハンマー等（図示せず）によって打ち込む。ここで、本実施形態の取り付け工具６は、略円筒状に形成されており、その内径が雄ネジ部Ｂを遊嵌しうる寸法に構成されている。また、取り付け工具６の先端部には、かしめ部４に押圧力を付与するためのかしめ爪６１が周方向に等角度間隔で３つ設けられている。各かしめ爪６１は、図３に示すように、内側に曲げられているとともに、その先端面が内側から外側にかけて下向きに傾斜されており、その先端がかしめ部４の外周縁部とほぼ一致する寸法に形成されている。これにより、かしめ部４を内方に押し込む力を作用しうるようになっている。なお、かしめ爪６１の構成は、上記に限られるものではなく、耐久性および加工性に優れており、かしめ部４をかしめられる形状や配置であればよい。 Subsequently, as shown in FIG. 3, the attachment tool 6 is brought into contact with the caulking portion 4 and driven by a hammer or the like (not shown). Here, the attachment tool 6 of the present embodiment is formed in a substantially cylindrical shape, and the inner diameter thereof is configured to allow the male screw portion B to be loosely fitted. Further, three caulking claws 61 for applying a pressing force to the caulking portion 4 are provided at the front end portion of the attachment tool 6 at equal angular intervals in the circumferential direction. As shown in FIG. 3, each caulking claw 61 is bent inward, and its tip surface is inclined downward from the inside to the outside, and its tip substantially coincides with the outer peripheral edge of the caulking portion 4. Dimension is formed. Thereby, the force which pushes the crimping part 4 inward can act. In addition, the structure of the crimping nail | claw 61 is not restricted above, It is excellent in durability and workability, What is necessary is just the shape and arrangement | positioning which can crimp the crimping part 4. FIG.
　上記の構成を備えた取り付け工具６を挿通孔２１から突出している雄ネジ部Ｂに差し込むと、図３に示すように、各かしめ爪６１の先端が、かしめ部４の上面に当接する。そして、ハンマー等（図示せず）によって取り付け工具６の後端部を打ち込むと、各かしめ爪６１が、かしめ部４に対して内方下向きの押圧力を付与する。 When the mounting tool 6 having the above-described configuration is inserted into the male screw portion B protruding from the insertion hole 21, the tip of each caulking claw 61 comes into contact with the upper surface of the caulking portion 4 as shown in FIG. When the rear end portion of the attachment tool 6 is driven with a hammer or the like (not shown), each caulking claw 61 applies an inward and downward pressing force to the caulking portion 4.
　これにより、リング状のかしめ部４のうち、各かしめ爪６１に当接していた３箇所が内方に傾斜するように塑性変形し、図４に示すように、雄ネジ部Ｂに深く食い込む。このようにナット取り外し防止具１が雄ネジ部Ｂにかしめられ、容易に外されなくなる。 Thus, the three portions of the ring-shaped caulking portion 4 that are in contact with the caulking claws 61 are plastically deformed so as to be inclined inward, and deeply bite into the male screw portion B as shown in FIG. Thus, the nut removal preventing tool 1 is caulked to the male screw portion B and cannot be easily removed.
　以上のように取り付けられたナット取り外し防止具１においては、把持防止部２が略円錐台形状に形成されているため、スパナ等のような一般的な工具では把持できず、容易に回転されることがない。また、例え把持防止部２を回転させたとしても、中空収容部３内のナットＮには回転力が伝達されないため、緩められることがない。 In the nut removal prevention tool 1 attached as described above, since the grip prevention part 2 is formed in a substantially truncated cone shape, it cannot be gripped by a general tool such as a spanner and is easily rotated. There is nothing. Moreover, even if the grip prevention part 2 is rotated, since the rotational force is not transmitted to the nut N in the hollow housing part 3, it is not loosened.
　以上のような本実施形態によれば、
１．高い信頼度でナットＮの取り外しを防止することができる。
２．高強度の材料で製造することができ、容易に破壊されない。
３．ナットＮの寸法公差に左右されることがなく、取り付け作業にかかる手間や時間を低減することができる。
４．ナットＮの座面形状によらず、確実に取り付けることができる。
５．ワッシャーＷやフランジ部の有無によらず、取り付けることができる。
６．強固に締め付けたナットＮに対して取り付けられるため、強い締結力を確保できる。
７．簡単な構造であるため用途に応じて各種の材料で製造でき、製造コストを低減することができる。
８．新たに締結するナットＮのみならず、既に現場で締結されている既設のナットＮにも簡単に取り付けることができる等の実用的な効果を奏する。 According to this embodiment as described above,
1. The removal of the nut N can be prevented with high reliability.
2. It can be made of high strength material and is not easily destroyed.
3. It is not affected by the dimensional tolerance of the nut N, and the labor and time required for the mounting work can be reduced.
4). Regardless of the shape of the seating surface of the nut N, it can be securely attached.
5). It can be attached with or without a washer W or a flange.
6). Since it is attached to the nut N that is firmly tightened, a strong fastening force can be secured.
7). Since it has a simple structure, it can be manufactured with various materials according to the application, and the manufacturing cost can be reduced.
8). There is a practical effect that it can be easily attached not only to the newly-fastened nut N but also to an existing nut N already fastened on site.
　なお、本発明に係るナット取り外し防止具１は、上述した実施形態に限定されるものではなく、適宜変更することができる。 In addition, the nut removal prevention tool 1 which concerns on this invention is not limited to embodiment mentioned above, It can change suitably.
　例えば、上述した本実施形態では、かしめ部４をリング状に形成しているが、これに限られるものではなく、挿通孔２１の周縁に沿って、複数のかしめ部４を所定の角度間隔で突出させるようにしてもよい。また、上述した本実施形態では、３つのかしめ爪６１を有する取り付け工具６を使用しているが、これに限られるものではなく、リング状のかしめ爪６１を設け、かしめ部４全体をかしめられるようにしてもよい。 For example, in the present embodiment described above, the caulking portions 4 are formed in a ring shape, but the present invention is not limited to this, and a plurality of caulking portions 4 are arranged at predetermined angular intervals along the periphery of the insertion hole 21. You may make it project. Moreover, in this embodiment mentioned above, although the attachment tool 6 which has the three crimping claws 61 is used, it is not restricted to this, The ring-shaped crimping nail | claw 61 is provided and the crimping part 4 whole can be crimped. You may do it.
符号の説明Explanation of symbols
　１　ナット取り外し防止具
　２　把持防止部
　３　中空収容部
　４　かしめ部
　５　フランジ状収容部
　６　取り付け工具
　２１　挿通孔
　３１　内周面
　３２　テーパ面
　６１　かしめ爪
　Ｂ　雄ネジ部
　Ｎ　ナット
　Ｗ　ワッシャー
　Ｘ　締結物
　Ｙ　被締結物 DESCRIPTION OF SYMBOLS 1 Nut removal prevention tool 2 Grip prevention part 3 Hollow accommodating part 4 Caulking part 5 Flange-shaped accommodating part 6 Mounting tool 21 Insertion hole 31 Inner peripheral surface 32 Tapered surface 61 Caulking claw B Male thread part N Nut W Washer X Fastening object Y Covered Fastener

Claims (2)

  1. 　ナットの取り外しを防止するためのナット取り外し防止具であって、
    　略円錐台形状に形成されているとともに、略中央にボルト等の雄ネジ部を挿通可能な挿通孔を備えた把持防止部と、
    　この把持防止部の下面における前記挿通孔の周りに略円形凹状に形成されて前記ナットを収容可能な容量を有する中空収容部と、
    　前記把持防止部の上面における挿通孔の周縁に沿って薄肉状に突出されており、挿通された雄ネジ部側にかしめることが可能なかしめ部と
    　を有しているナット取り外し防止具。     A nut removal prevention tool for preventing removal of the nut,
    A grip prevention portion that is formed in a substantially truncated cone shape and has an insertion hole through which a male screw portion such as a bolt can be inserted substantially in the center,
    A hollow accommodating portion formed in a substantially circular concave shape around the insertion hole in the lower surface of the grip prevention portion and having a capacity capable of accommodating the nut;
    A nut removal preventing tool having a caulking portion that protrudes thinly along the periphery of the insertion hole on the upper surface of the grip prevention portion and can be caulked to the inserted male screw portion side.
  2. 　請求項１において、前記把持防止部の下面には、前記中空収容部の外周であって、当該中空収容部に連続する略円形凹状のフランジ状収容部が形成されているナット取り外し防止具。 2. The nut removal preventing device according to claim 1, wherein a substantially circular concave flange-shaped housing portion that is an outer periphery of the hollow housing portion and is continuous with the hollow housing portion is formed on a lower surface of the grip prevention portion.
PCT/JP2009/052236 2009-02-10 2009-02-10 Nut removal prevention device WO2010092669A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2010550366A JPWO2010092669A1 (en) 2009-02-10 2009-02-10 Nut removal prevention tool
PCT/JP2009/052236 WO2010092669A1 (en) 2009-02-10 2009-02-10 Nut removal prevention device

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Application Number Priority Date Filing Date Title
PCT/JP2009/052236 WO2010092669A1 (en) 2009-02-10 2009-02-10 Nut removal prevention device

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104791359A (en) * 2015-04-20 2015-07-22 西安海智机电设备有限公司 Anti-theft screw assembly
CN113124035A (en) * 2019-12-31 2021-07-16 苏州佳世达光电有限公司 Anti-dismantling system, anti-dismantling combination and dismantling tool

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11257331A (en) * 1998-03-13 1999-09-21 Sanki Eng Co Ltd Method for preventing loosening of nut fastened on bolt and loosening preventing tool
JP2000009125A (en) * 1998-04-22 2000-01-11 Asahi Metal Ind Ltd Protective cap for bolt and nut
JP2001234501A (en) * 1999-12-14 2001-08-31 Kowa Concrete Kk Bolt for track, nut for track, fastener for track, track fastening device, and tool for preventing loosening

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11257331A (en) * 1998-03-13 1999-09-21 Sanki Eng Co Ltd Method for preventing loosening of nut fastened on bolt and loosening preventing tool
JP2000009125A (en) * 1998-04-22 2000-01-11 Asahi Metal Ind Ltd Protective cap for bolt and nut
JP2001234501A (en) * 1999-12-14 2001-08-31 Kowa Concrete Kk Bolt for track, nut for track, fastener for track, track fastening device, and tool for preventing loosening

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104791359A (en) * 2015-04-20 2015-07-22 西安海智机电设备有限公司 Anti-theft screw assembly
CN113124035A (en) * 2019-12-31 2021-07-16 苏州佳世达光电有限公司 Anti-dismantling system, anti-dismantling combination and dismantling tool
CN113124035B (en) * 2019-12-31 2024-05-14 苏州佳世达光电有限公司 Anti-disassembly system, anti-disassembly combination and disassembly tool

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