WO2010092669A1 - Dispositif de prévention de retrait d'écrou - Google Patents

Dispositif de prévention de retrait d'écrou 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
Authority
WO
WIPO (PCT)
Prior art keywords
nut
insertion hole
removal
section
shape
Prior art date
Application number
PCT/JP2009/052236
Other languages
English (en)
Japanese (ja)
Inventor
伊藤勝夫
Original Assignee
イイファス株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by イイファス株式会社 filed Critical イイファス株式会社
Priority to PCT/JP2009/052236 priority Critical patent/WO2010092669A1/fr
Priority to JP2010550366A priority patent/JPWO2010092669A1/ja
Publication of WO2010092669A1 publication Critical patent/WO2010092669A1/fr

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Classifications

    • 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)
  • Bolts, Nuts, And Washers (AREA)
  • Dowels (AREA)

Abstract

L'invention porte sur un dispositif de prévention de retrait d'écrou présentant une résistance élevée atteinte sans utiliser de structure complexe, pouvant être fabriqué à faible coût, pouvant être monté indépendamment de la tolérance dimensionnelle de l'écrou et de la forme de la surface du siège, pouvant maintenir solidement l'écrou dans l'état vissé, et présentant une sécurité améliorée en rendant le retrait de l'écrou difficile. Le dispositif de prévention de retrait d'écrou (1) destiné à empêcher l'écrou (N) de s'en aller a une section de prévention pour maintien (2) conçue sous une forme conique sensiblement tronquée et comprenant un trou d'insertion (21) ménagé sensiblement au centre de la section de prévention pour maintien (2) et permettant à une section de vis mâle (B) d'un boulon d'être introduit dans le trou d'insertion (21), une section de retenue creuse (3) qui est formée dans la surface inférieure de la section de prévention par maintien (2), comprend un élément en forme de cavité sensiblement circulaire disposé autour du trou d'insertion (21) et comprend un volume apte à recevoir l'écrou (N), et une section de jalonnement (4) faisant saillie sous forme de plaque mince à partir de la surface supérieure de la section de prévention de maintien (2) de façon à s'étendre le long du bord périphérique du trou d'insertion (21) et pouvant être empilée sur la vis mâle (B) insérée.
PCT/JP2009/052236 2009-02-10 2009-02-10 Dispositif de prévention de retrait d'écrou WO2010092669A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2009/052236 WO2010092669A1 (fr) 2009-02-10 2009-02-10 Dispositif de prévention de retrait d'écrou
JP2010550366A JPWO2010092669A1 (ja) 2009-02-10 2009-02-10 ナット取り外し防止具

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2009/052236 WO2010092669A1 (fr) 2009-02-10 2009-02-10 Dispositif de prévention de retrait d'écrou

Publications (1)

Publication Number Publication Date
WO2010092669A1 true WO2010092669A1 (fr) 2010-08-19

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PCT/JP2009/052236 WO2010092669A1 (fr) 2009-02-10 2009-02-10 Dispositif de prévention de retrait d'écrou

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WO (1) WO2010092669A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104791359A (zh) * 2015-04-20 2015-07-22 西安海智机电设备有限公司 一种防盗螺钉组件
CN113124035A (zh) * 2019-12-31 2021-07-16 苏州佳世达光电有限公司 防拆系统、防拆组合及拆卸工具

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11257331A (ja) * 1998-03-13 1999-09-21 Sanki Eng Co Ltd ボルトに締着させたナットの緩め防止方法および緩め防止具
JP2000009125A (ja) * 1998-04-22 2000-01-11 Asahi Metal Ind Ltd ボルト・ナット用保護キャップ
JP2001234501A (ja) * 1999-12-14 2001-08-31 Kowa Concrete Kk 軌道用ボルト、軌道用ナット、軌道用締結具、軌道締結装置および緩解防止具

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11257331A (ja) * 1998-03-13 1999-09-21 Sanki Eng Co Ltd ボルトに締着させたナットの緩め防止方法および緩め防止具
JP2000009125A (ja) * 1998-04-22 2000-01-11 Asahi Metal Ind Ltd ボルト・ナット用保護キャップ
JP2001234501A (ja) * 1999-12-14 2001-08-31 Kowa Concrete Kk 軌道用ボルト、軌道用ナット、軌道用締結具、軌道締結装置および緩解防止具

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104791359A (zh) * 2015-04-20 2015-07-22 西安海智机电设备有限公司 一种防盗螺钉组件
CN113124035A (zh) * 2019-12-31 2021-07-16 苏州佳世达光电有限公司 防拆系统、防拆组合及拆卸工具
CN113124035B (zh) * 2019-12-31 2024-05-14 苏州佳世达光电有限公司 防拆系统、防拆组合及拆卸工具

Also Published As

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