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WO2016148266A1 - Nut - Google Patents

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Publication number
WO2016148266A1
WO2016148266A1 PCT/JP2016/058618 JP2016058618W WO2016148266A1 WO 2016148266 A1 WO2016148266 A1 WO 2016148266A1 JP 2016058618 W JP2016058618 W JP 2016058618W WO 2016148266 A1 WO2016148266 A1 WO 2016148266A1
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WO
WIPO (PCT)
Prior art keywords
nut
bolt
hole
female screw
contact member
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2016/058618
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French (fr)
Japanese (ja)
Inventor
周 加藤
悠 加藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO2016148266A1 publication Critical patent/WO2016148266A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
    • F16B39/284—Locking by means of elastic deformation
    • 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

Definitions

  • the present invention relates to a nut, and more particularly to a nut that can prevent the nut from dropping when it is screwed into a bolt.
  • Bolts and nuts are fastening parts that are frequently used for fixing members in buildings, mechanical devices, electrical products, and the like.
  • a T-shaped fixture 2 is fastened to a wall 1 with screws 3 and With the pipe 6 passing through the ring portion 5, the fixture 2 is sandwiched between the two attachment portions 7 and 7 of the standing band 4 from both sides, and two holes are formed in the attachment portions 7 and 7 and the fixture 2 respectively. 8 and 9 are combined, the bolts 10 and 10 are passed, the nuts 11 and 11 are screwed into the bolts 10 and 10 by hand, and the nuts 11 and 11 are turned with a predetermined torque with a wrench (not shown) and tightened.
  • the standing band 4 is fastened to the fixture 2 (see Japanese Utility Model Laid-Open No. 6-47793).
  • the nut 11 is first grasped with a finger, the female screw portion 12 of the nut 11 is pressed against the tip of the male screw portion 13 of the bolt 10, and the nut 11 is rotated and meshed. 11 is screwed into the male screw portion 13 of the bolt 10 a little, then the finger is released from the nut 11 to return the posture of the finger, and then the nut 11 is again grasped with the finger and turned a little. The operation of advancing the screwing of the nut 11 to the bolt 10 is repeated.
  • 2007-092925 when a nut guiding portion having a diameter smaller than the valley diameter of the male screw portion is protruded on the tip side of the male screw portion of the bolt, and the nut is screwed together, The female screw hole is inserted into the nut guiding portion.
  • the male screw portion of the bolt and the female screw portion of the nut start to be screwed together, when the finger is released from the nut, the nut is caught by the nut guiding portion and is difficult to fall.
  • it can be applied only to a special bolt in which a nut guiding portion is projected from the tip of the bolt.
  • the drop-off prevention structure described in Japanese Patent Application Laid-Open No. 2011-247308 forms a medium diameter portion, a small diameter portion, and a large diameter portion (male screw portion) from the tip of the bolt, and the diameter can be expanded and contracted on the trailing end surface of the nut.
  • a drop-off prevention member made of an elastic member is expanded and fitted into the drop-off prevention member. When the diameter is expanded, the opening diameter is larger than the medium diameter portion and the small diameter portion, smaller than the large diameter portion, and when the diameter is reduced, the opening diameter is the medium diameter portion.
  • An interference portion smaller than the large diameter portion is provided.
  • the interference part can be screwed in without interfering with the medium diameter part and the small diameter part, and the interference part is where the screw has advanced by the height of the nut.
  • the interference part does not interfere with the small-diameter part and the medium-diameter part. There is a fault that falls off.
  • the nut with a lock described in JP-A-56-160417 also only prevents the nut from being loosened after the nut and the bolt are screwed together, and when the nut and the bolt are engaged before being screwed together. However, it is not intended to prevent falling when a finger is accidentally released from the nut.
  • the protruding piece of the locking device main body is pressed against the bottom of the bolt screw to prevent it from loosening.
  • the present invention has been made in view of the above-described problems of the prior art, and an object thereof is to provide a nut capable of reliably preventing the nut from being accidentally dropped without using a special bolt. .
  • a drop prevention part is provided near the bottom of the female screw hole in the nut body, At this time, the fall prevention portion is located closer to the bottom surface than one end of the bottom surface side of the nut body, among the female screw portions of the nut body,
  • the fall prevention part is provided with a through-hole part that is concentric with the female screw part and whose opening diameter is smaller than the valley diameter of the female screw part,
  • the through-hole portion can be inserted into the bolt tip portion in the axial direction, and in order to screw the nut body into the bolt, one end of the nut main body on the bottom side of the nut body is used as the bolt tip portion.
  • a drop prevention part is provided near the bottom of the female screw hole in the nut body, At this time, the fall prevention portion is positioned closer to the bottom surface than one end of the nut bottom surface side of the female screw portion of the nut body,
  • the fall prevention part is provided with a through-hole part that is concentric with the female screw part and whose opening diameter is smaller than the valley diameter of the female screw part,
  • the through-hole portion can be inserted into the bolt tip portion in the axial direction, and in order to screw the nut body into the bolt, one end of the nut main body on the bottom side of the nut body is used as the bolt tip portion.
  • the through hole portion of the fall prevention portion is It is pushed open at the tip of the male screw part and presses against the outer periphery of the male screw part or engages with the male screw thread. Accordingly, even if the finger is accidentally released from the nut before the female screw portion starts to be screwed with the bolt male screw portion, the movement of the nut is restrained by the fall preventing portion, so that the nut is prevented from falling.
  • FIG. 1 is an explanatory view showing an example of using conventional bolts and nuts.
  • FIG. 2 is a cross-sectional view of a nut with a pressure contact member according to one embodiment of the present invention (Example 1).
  • FIG. 3 is a bottom view of the nut of FIG.
  • FIG. 4 is an operation explanatory view of a nut with a pressure contact member.
  • FIG. 5 is an operation explanatory view of a nut with a pressure contact member.
  • 6A is a cross-sectional view of a nut according to the modification of FIG. 2
  • FIG. 7 is a cross-sectional view of another modification of FIG.
  • FIG. 8A is a cross-sectional view of a nut according to still another modified example of FIG. 2, and FIG. FIG.
  • FIG. 9 is a cross-sectional view of another modification of FIG.
  • FIG. 10A is a cross-sectional view of a nut according to another modification of FIG. 2
  • FIG. 11 (1) is a cross-sectional view of a nut according to still another modification of FIG. 2, (2) is a perspective view of a pressure contact member in (1), and (3) is an operation explanatory view of the nut of (1).
  • 12 (1) is a cross-sectional view of a nut according to still another modification of FIG. 2, (2) is a perspective view of an engaging member in (1), and (3) is an explanatory view of the operation of the nut in (1). It is.
  • FIGS. 2 is a cross-sectional view of a nut with a pressure contact member according to the present invention (here, a hexagonal nut), and FIG. 3 is a bottom view of the nut of FIG. 2 and 3, reference numeral 10 denotes a nut, and a pressure contact member as a thick ring-shaped fall prevention portion formed by a nut body 11 made of steel, stainless steel, or the like, and an elastic member such as rubber or plastic resin. It consists of twenty.
  • the nut body 11 has a female screw hole 12 and a female screw part 13.
  • the through hole 21 and the female screw portion 13 are attached to the end face 14 on the bottom side where the female screw hole 12 is opened by an adhesive so as to be coaxial (concentric).
  • the thickness H of the pressure contact member 20 is, for example, about 1 to 5 times the distance between adjacent screw threads of the female screw portion 13. Since the pressure contact member 20 can be elastically deformed, the through hole 21 can be inserted into and removed from the bolt tip portion in the axial direction.
  • the nut 10 configured as described above is used in combination with the bolt 1 made of steel, stainless steel, or the like in FIG. 4 and 5 are explanatory views of the method of using the nut described above, and the operation of the above-described embodiment will be described below with reference to these drawings. 4 and 5, it is assumed that the bolt 1 is arranged horizontally and passed through the holes of the three plate-like fastening target members 100, 101, 102.
  • the nut 10 is screwed into the bolt 1, while holding the head 2 of the bolt 1 with the finger of the left hand, the nut 10 is first grasped with the finger of the right hand, and the nut 10 is removed from the end surface 14 on the bottom surface side where the pressure contact member 20 is attached.
  • the diameter of the through hole 21 of the pressure contact member 20 is increased by the male screw portion 3, it can be screwed together without any trouble. Even if the female screw portion 13 of the nut 10 is not meshed with the male screw portion 3 and the finger is released from the nut 10, the frictional force acting between the press contact member 20 attached to the nut 10 and the outer periphery of the male screw portion 3. Do not fall by. Then, the nut 10 may be screwed into the male screw portion 3 and finally tightened with a prescribed torque by using a wrench.
  • the nut 10 can be prevented from dropping in the same manner when the bolt 1 is disposed vertically downward (the head 2 of the bolt 1 is up and the tip 4 is down). Can be achieved.
  • the pressure contact member 20 is elastic. The through hole 21 is deformed and is pushed open to the distal end portion 4 of the male screw portion and press-contacts with the outer periphery of the male screw portion 3.
  • the pressure contact member 20 is fixed to the distal end portion 4 of the male screw portion 3 by friction. Therefore, the nut 10 does not fall from the bolt 1. Further, when the through hole 21 of the pressure contact member 20 is inserted into the tip 4 of the bolt 1, the axis of the nut 10 and the axis of the bolt 1 substantially coincide with each other. There is no need to adjust the vertical movement. Further, since the perforated pressure contact member 20 made of an elastic member such as rubber or plastic resin is simply attached to the end surface 14 on the bottom surface side of the nut 10, the configuration is simple.
  • the bolt 1 can use the general type without a nut induction
  • the case where the pressure contact member is attached to the bottom end surface of the normal hexagon nut has been described as an example.
  • the present invention is not limited to this, and the bottom surface of the female screw hole is not limited thereto.
  • the fall prevention portion is provided closer to the bottom surface than the female screw portion on the side.
  • a through hole 21 having a diameter L1 that is slightly smaller than the valley diameter L of the female screw portion 13 is provided at the center, and a ring-shaped press contact member 20 made of an elastic member is provided.
  • the through hole 21 and the female screw portion 13 are coaxial.
  • the nut 10A may be configured by being attached with an adhesive or the like.
  • the bottom-side screwless portion 16 is inserted into the tip portion 4 of the bolt 1.
  • the through hole 21 of the pressure contact member 20 is applied to the tip portion 4 of the bolt 1 in the axial direction.
  • the through-hole 21 When inserted, the through-hole 21 is pushed open to the distal end portion 4 by elastic deformation, and the periphery of the through-hole 21 comes into pressure contact with the outer periphery of the male screw portion 3 (FIG. 6 (2)). Accordingly, even if the finger 10 is accidentally released before the female screw portion 13 of the nut 10A is screwed onto the male screw portion 3 and the nut 10A is about to fall due to gravity, the press contact member 20 is moved to the tip of the male screw portion 3. Since it is fixed to the portion 4, the nut 10A does not fall. Further, as shown in FIG.
  • the nut 10B may be configured by mounting the pressure contact member 20B made of a ring-shaped elastic member having the through hole 21 with an adhesive or the like so that the through hole 21 and the female screw portion 13 are coaxial.
  • the nut body 11 ⁇ / b> A has a through hole 21 having a diameter L ⁇ b> 1 slightly smaller than the valley diameter L of the female screw portion 13 in the center on the end surface 14 on the bottom surface side, and the outer diameter is the end surface.
  • the nut 10C may be configured by bonding a ring-shaped bottom plate 30 such as steel or stainless steel with an adhesive or the like on the outer side.
  • the bottom plate 30 has a round hole 31 having the same diameter as the screwless portion 16.
  • a ring-shaped groove 17 formed in the screwless portion 16D is formed in the center of the nut body 11D where the screwless portion 16D on the bottom side of the female screw hole 12D is deep.
  • a through hole 21 having a diameter L1 slightly smaller than the valley diameter L of the female screw portion 13 is bonded, and a ring-shaped pressure contact member 20D made of an elastic member is bonded so that the through hole 21 and the female screw portion 13 are coaxial.
  • the nut 10 ⁇ / b> D may be configured by mounting with an agent or the like.
  • the non-threaded portion 16E on the bottom side is deeper than the nut body 11E.
  • a ring pipe-shaped press contact member 20E made of an elastic member such as rubber or plastic resin is provided at the center with a through hole 21E having an opening diameter L1 that is slightly smaller than the valley diameter L of the female screw part 13.
  • the nut 10E may be configured by attaching with an adhesive or the like so that the female screw portion 13 is coaxial.
  • the through hole 21E is detachable in the axial direction with respect to the tip 4 of the bolt 1.
  • the nut 10E is inserted into the front end portion 4 of the bolt 1 from the screwless portion 16E on the bottom surface side.
  • the press contact member 20E has a radius.
  • the through hole 21E is pushed open to the tip 4 while being elastically deformed outward in the direction, and is pressed against the outer periphery of the male screw 3 (FIG. 10 (2)).
  • the pressure contact member 20E is not moved to the tip of the male screw portion 3. Since it is fixed to the portion 4, the nut 10E does not fall.
  • the pressure contact member is formed of a magnetic sheet such as an elastic neody sheet, so that the through hole is fixed to the tip of the male screw portion of the bolt by both pressure contact and magnetic attachment. You may do it. Moreover, you may make it fix to the front-end
  • the nut main body 11F having the screwless portion 16F on the bottom surface side of the female screw hole 12F has a diameter larger than the hole diameter L2 of the screwless portion 16F on the end surface 14 on the bottom surface side.
  • a groove 18 is formed, and a ring-shaped pressure contact member 20F formed of a thin plastic resin plate having elasticity or a thin metal plate having elasticity is adhered to the groove 18 with an adhesive or the like.
  • the nut 10F may be configured by integrating them.
  • the pressure contact member 20F is provided with four claw portions 22 radially, and each claw portion 22 has flexibility and is convex toward the axis. Curved in a semicircular arc shape.
  • the through hole portion 21F is coaxial with the female screw portion 13 and has an opening diameter L1 ′ that is slightly smaller than the valley diameter L.
  • the through hole 21F can be inserted into and removed from the tip 4 of the bolt 1 in the axial direction.
  • the nut 10F is inserted into the front end portion 4 of the bolt 1 from the screwless portion 16F on the bottom surface side.
  • the through hole 21F is pushed open to the tip 4 of the bolt 1 while bending outward in the radial direction, and the curved apex of the claw 22 is pressed against the outer periphery of the male screw 3 (FIG. 11 (3)). Therefore, before the female screw portion 13 of the nut 10F is brought into contact with the male screw portion 3 and screwed, the finger is accidentally released and the nut 10F attempts to drop due to gravity. Since it is fixed to the portion 4, the nut 10F does not fall. Note that three or five or more claw portions 22 may be provided. In the modified example of FIG.
  • the through-hole portion may be fixed to the front end portion of the male screw portion of the bolt by both the press-contact and the magnetic attachment by forming the press-contact member with a magnetic material magnetized in advance. .
  • the fall prevention part is prevented from falling by being pressed against the tip of the male screw part of the bolt, but the present invention is not limited to this, and the fall prevention part May be prevented from falling by engaging with the male screw thread of the male screw part of the bolt. For example, as shown in FIG.
  • a groove hole 18 having a diameter larger than the hole diameter L2 of the screwless portion 16F is formed on the end surface 14 on the bottom surface side of the nut 11F similar to FIG. 11 (1).
  • An engagement member 200 as a ring-shaped fall prevention portion formed of a thin plastic resin plate having elasticity, a thin metal plate having elasticity, or the like is attached to the hole 18 with an adhesive or the like, or integrated by welding or the like.
  • the nut 10G may be configured.
  • the engaging member 200 is provided with four claw portions 201 radially, and each claw portion 201 has flexibility and extends linearly toward the axis. It is installed. An opening surrounded by the tips of the four claw portions 201 forms a through-hole portion 202.
  • the through-hole portion 202 is coaxial with the female screw portion 13, and has a valley diameter of the female screw portion 13 (the peak of the male screw portion of the bolt). It has an opening diameter L1 "that is smaller than the diameter L and larger than the peak diameter (valley diameter of the male screw portion of the bolt) L4.
  • the through-hole portion 202 can be inserted into and removed from the tip portion 4 of the bolt 1 in the axial direction.
  • the nut 10G is inserted into the front end portion 4 of the bolt 1 from the screwless portion 16F on the bottom side, but first, when the through-hole portion 202 of the engagement member 200 is applied to the front end portion 4 of the bolt 1 and inserted in the axial direction.
  • the engaging member 200 is locked to the distal end portion 4 of the male screw portion 3, so that the nut 10G does not fall.
  • the engaging member is formed of a pre-magnetized magnetic body so that the through hole is fixed to the tip of the male screw portion of the bolt by both pressure welding and magnetic attachment. good. Moreover, you may make it fix to the front-end
  • the present invention can be applied to hexagon nuts, cap nuts, nuts with flanges (nuts with flanges), and the like.

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

Abstract

In the present invention, even without using a special bolt, it is possible to reliably prevent the mistaken falling off of a nut. A nut (10) is constituted by a nut body (11) and a pressure-contact member (20) which is elastic. The pressure-contact member (20) includes, in the center thereof, a through hole (21) having a diameter (L1) which is only slightly smaller than the valley diameter (=the peak diameter of a male screw section (3) of a bolt (1)) (L) of a female screw section (13). The pressure-contact member (20) is attached, using an adhesive, to an end face (14) which is in the nut body (11), to which a female screw hole (12) opens and which is on the bottom-surface side, so that the through hole (21) and the female screw section (13) are aligned to be coaxial (concentric). The thickness (H) of the pressure-contact member (20) is, for example, approximately 1-5 times the distance between adjacent screw peaks of the female screw section (13). Because the pressure-contact member (20) is elastically deformable, the through hole (21) can pass-over the bolt distal-end section (4) in the axial direction. When the nut (10) is attached to the bolt (1) from the bottom-surface side of the nut, before the female screw section (13) of the nut (10) makes contact with the distal end of the bolt (1), the through hole (21) of the pressure-contact member (20) is pressed open by the distal end of the bolt (1) and is thereby put into a state of pressure contact.

Description

ナットnut

　本発明はナットに係り、とくにボルトに螺合しようとする際にナットを落下させるのを防止できるようにしたナットに関する。 The present invention relates to a nut, and more particularly to a nut that can prevent the nut from dropping when it is screwed into a bolt.

　ボルトとナットは建築物、機械装置、電気製品などで部材を固定するために多用されている締結部品である。例えば建物内にパイプを上下に配設する場合、図１（１）、（２）に示す如く、壁１にＴ字状の固定具２をネジ３で留めで取り付けておき、立てバンド４のリング部５にパイプ６を通した状態で立てバンド４の２枚の取り付け部７、７で固定具２を両側から挟み、取り付け部７、７と固定具２に各々２箇所ずつ開けられた穴８と９を合わせてボルト１０、１０を通し、ナット１１、１１を手でボルト１０、１０に螺合し、更にレンチ（図示せず）で所定のトルクでナット１１、１１を回して締め、立てバンド４を固定具２に締結している（実開平６−４７７９３号公報参照）。
　ナット１１を手でボルト１０に螺合する際、最初にナット１１を指で掴んでナット１１の雌螺子部１２をボルト１０の雄螺子部１３の先端に押し当て、少し回して噛み合わせながらナット１１の雌螺子部１２をボルト１０の雄螺子部１３に少し螺合し、次に、指をナット１１から放して指の姿勢を元に戻したのち再びナット１１を指で掴んで少し回し、ボルト１０に対するナット１１の螺合を進めるという動作を繰り返す。
　このとき、最初にナット１１の雌螺子部１２とボルト１０の雄螺子部１３が噛み合わないまま指でナット１１を少し回したあと指を放してしまい、ナット１１を床に落下させてしまうことが多い。脚立やカゴ車を用いて高所で作業者がパイプ６を手で持ちながら配設作業をしているときなど、床に落下させたナット１１を探すのが非常に面倒な作業となっていた。
　従来、ナットの落下を防止する工夫をしたものとして、特開２００７−０９２９２５号、特開２０１１−２４７３０８号、特開昭５６−１６０４１７号がある。特開２００７−０９２９２５号公報記載のボルトは、ボルトの雄螺子部の先端側に雄螺子部の谷径より小さい径のナット誘導部を突設させ、ナットを螺合する際、最初にナットの雌螺子孔をナット誘導部に挿入するようにしたものである。ボルトの雄螺子部とナットの雌螺子部が螺合し始める前に、ナットから指が離れたときナットがナット誘導部に引っ掛かって落下し難くなる。けれども、ボルトの先端にナット誘導部を突設させた特殊なボルトにしか適用できなくなってしまう。また、ボルト頭部を上、ナット誘導部を下に配設する場合は、ナットが自重でナット誘導部から抜け落ちてしまう。
　また、特開２０１１−２４７３０８号公報記載の脱落防止構造は、ボルトの先端から中径部、小径部、大径部（雄螺子部）を形成し、ナットの追い側端面に径を拡縮自在な弾性部材からなる脱落防止部材を拡径させて嵌め、脱落防止部材に拡径時は開口径が中径部、小径部より大きく、大径部より小さく、縮径時は開口径が中径部、大径部より小さい干渉部分を設けたものである。ナットをボルトに螺合する際、干渉部分が中径部、小径部と干渉することなく、螺合をさせていくことができ、ナットの高さ分だけ螺合が進んだ所で、干渉部分が大径部（雄螺子部）と干渉して脱落防止部材がナットから脱落し、縮径して干渉部分が小径部に嵌る。これにより、雄螺子部に螺合したナットが緩んで雄螺子部から外れても、脱落防止部材に引っ掛かって脱落が防止される。けれども、ナットをボルトに螺合する際、雄螺子部と雌螺子部の螺合が始まる前にナットから指が放れてしまった場合、干渉部分は小径部、中径部と干渉しないのでナットが抜け落ちてしまう欠点がある。
　特開昭５６−１６０４１７号公報記載の弛止め付ナットも、ナットとボルトを螺合したあとのナットの弛み止め防止をしているに過ぎず、ナットとボルトが螺合する前の噛み合せの際に、誤ってナットから指を離したときの落下防止は目的としていない。弛止め具本体の突出片がボルトネジの谷底に圧接することで弛止めを行うようにしており、少なくともナットの高さ分以上、ナットがボルトネジとの螺合を終えていないと弛み止め作用は働かない。ボルトネジにナットがまだ何ら螺合していないときは当然、突出片はボルトと何ら関係を持っておらず、ナットから誤って指を放すとナットが落下してしまう欠点がある。 Bolts and nuts are fastening parts that are frequently used for fixing members in buildings, mechanical devices, electrical products, and the like. For example, when pipes are arranged vertically in a building, as shown in FIGS. 1 (1) and (2), a T-shaped fixture 2 is fastened to a wall 1 with screws 3 and With the pipe 6 passing through the ring portion 5, the fixture 2 is sandwiched between the two attachment portions 7 and 7 of the standing band 4 from both sides, and two holes are formed in the attachment portions 7 and 7 and the fixture 2 respectively. 8 and 9 are combined, the bolts 10 and 10 are passed, the nuts 11 and 11 are screwed into the bolts 10 and 10 by hand, and the nuts 11 and 11 are turned with a predetermined torque with a wrench (not shown) and tightened. The standing band 4 is fastened to the fixture 2 (see Japanese Utility Model Laid-Open No. 6-47793).
When the nut 11 is screwed into the bolt 10 by hand, the nut 11 is first grasped with a finger, the female screw portion 12 of the nut 11 is pressed against the tip of the male screw portion 13 of the bolt 10, and the nut 11 is rotated and meshed. 11 is screwed into the male screw portion 13 of the bolt 10 a little, then the finger is released from the nut 11 to return the posture of the finger, and then the nut 11 is again grasped with the finger and turned a little. The operation of advancing the screwing of the nut 11 to the bolt 10 is repeated.
At this time, first the nut 11 is turned slightly with a finger without the female screw portion 12 of the nut 11 and the male screw portion 13 of the bolt 10 being engaged with each other, then the finger is released, and the nut 11 is dropped to the floor. Many. Searching for the nut 11 dropped on the floor, such as when an operator is using a stepladder or a cart to place the pipe 6 while holding the pipe 6 by hand, was a very troublesome task. .
Conventionally, there are JP 2007-092925, JP 2011-247308, and JP 56-160417 which have been devised to prevent the nut from falling. In the bolt described in Japanese Patent Application Laid-Open No. 2007-092925, when a nut guiding portion having a diameter smaller than the valley diameter of the male screw portion is protruded on the tip side of the male screw portion of the bolt, and the nut is screwed together, The female screw hole is inserted into the nut guiding portion. Before the male screw portion of the bolt and the female screw portion of the nut start to be screwed together, when the finger is released from the nut, the nut is caught by the nut guiding portion and is difficult to fall. However, it can be applied only to a special bolt in which a nut guiding portion is projected from the tip of the bolt. Further, when the bolt head portion is arranged on the upper side and the nut guide portion is arranged on the lower side, the nut falls off the nut guide portion by its own weight.
Further, the drop-off prevention structure described in Japanese Patent Application Laid-Open No. 2011-247308 forms a medium diameter portion, a small diameter portion, and a large diameter portion (male screw portion) from the tip of the bolt, and the diameter can be expanded and contracted on the trailing end surface of the nut. A drop-off prevention member made of an elastic member is expanded and fitted into the drop-off prevention member. When the diameter is expanded, the opening diameter is larger than the medium diameter portion and the small diameter portion, smaller than the large diameter portion, and when the diameter is reduced, the opening diameter is the medium diameter portion. An interference portion smaller than the large diameter portion is provided. When the nut is screwed onto the bolt, the interference part can be screwed in without interfering with the medium diameter part and the small diameter part, and the interference part is where the screw has advanced by the height of the nut. Interferes with the large-diameter portion (male screw portion), and the drop-off prevention member falls off the nut, reduces the diameter, and the interference portion fits into the small-diameter portion. Thereby, even if the nut screwed into the male screw part loosens and comes off from the male screw part, the nut is caught by the drop-off preventing member and is prevented from falling off. However, when the nut is screwed onto the bolt, if the finger is released before the male screw and female screw begin to be screwed together, the interference part does not interfere with the small-diameter part and the medium-diameter part. There is a fault that falls off.
The nut with a lock described in JP-A-56-160417 also only prevents the nut from being loosened after the nut and the bolt are screwed together, and when the nut and the bolt are engaged before being screwed together. However, it is not intended to prevent falling when a finger is accidentally released from the nut. The protruding piece of the locking device main body is pressed against the bottom of the bolt screw to prevent it from loosening. If the nut has not been screwed with the bolt screw at least the height of the nut, the locking operation will work. Absent. Naturally, when the nut is not yet screwed into the bolt screw, the protruding piece has no relation with the bolt, and there is a drawback that the nut falls if the finger is accidentally released from the nut.

実開平６−４７７９３号公報Japanese Utility Model Publication No. 6-47793 特開２００７−０９２９２５号JP 2007-092925 A 特開２０１１−２４７３０８号公報JP 2011-247308 A 特開昭５６−１６０４１７号公報JP-A-56-160417

　本発明は上記した従来技術の問題に鑑みなされたもので、特殊ボルトを用いなくても、ナットを誤って落下させるのを確実に防止できるようにしたナットを提供することを、その目的とする。 The present invention has been made in view of the above-described problems of the prior art, and an object thereof is to provide a nut capable of reliably preventing the nut from being accidentally dropped without using a special bolt. .

　請求項１記載の発明では、
　ナット本体の雌螺子孔の底面近くに落下防止部を設け、
　この際、落下防止部は、ナット本体の雌螺子部の内、ナット本体の底面側の一端より底面寄りに位置するようにし、
　落下防止部に、雌螺子部と同心で開口径が雌螺子部の谷径より小さい通し口部を設け、
　この通し口部はボルト先端部に対し軸方向に挿通可能とするとともに、ナット本体をボルトに螺合させるため、ナット本体の雌螺子部の内、ナット本体の底面側の一端をボルト先端部に当接する際、ボルト先端部に軸方向に挿通された通し口部が当該ボルト先端部に押し開かれてボルト先端部の外周に圧接するようにしたこと、
　を特徴としている。
　請求項２記載の発明では、
　ナット本体の雌螺子孔の底面近くに落下防止部を設け、
　この際、落下防止部は、ナット本体の雌螺子部の内、ナット底面側の一端より底面寄りに位置するようにし、
　落下防止部に、雌螺子部と同心で開口径が雌螺子部の谷径より小さい通し口部を設け、
　この通し口部はボルト先端部に対し軸方向に挿通可能とするとともに、ナット本体をボルトに螺合させるため、ナット本体の雌螺子部の内、ナット本体の底面側の一端をボルト先端部に当接する際、ボルト先端部に軸方向に挿通された通し口部が当該ボルト先端部に押し開かれてボルト先端部の雄螺子山に係合するようにしたこと、
　を特徴としている。 In invention of Claim 1,
A drop prevention part is provided near the bottom of the female screw hole in the nut body,
At this time, the fall prevention portion is located closer to the bottom surface than one end of the bottom surface side of the nut body, among the female screw portions of the nut body,
The fall prevention part is provided with a through-hole part that is concentric with the female screw part and whose opening diameter is smaller than the valley diameter of the female screw part,
The through-hole portion can be inserted into the bolt tip portion in the axial direction, and in order to screw the nut body into the bolt, one end of the nut main body on the bottom side of the nut body is used as the bolt tip portion. When abutting, the through hole inserted in the bolt tip portion in the axial direction is pushed open to the bolt tip portion and pressed against the outer periphery of the bolt tip portion,
It is characterized by.
In invention of Claim 2,
A drop prevention part is provided near the bottom of the female screw hole in the nut body,
At this time, the fall prevention portion is positioned closer to the bottom surface than one end of the nut bottom surface side of the female screw portion of the nut body,
The fall prevention part is provided with a through-hole part that is concentric with the female screw part and whose opening diameter is smaller than the valley diameter of the female screw part,
The through-hole portion can be inserted into the bolt tip portion in the axial direction, and in order to screw the nut body into the bolt, one end of the nut main body on the bottom side of the nut body is used as the bolt tip portion. When abutting, the through hole inserted in the bolt tip portion in the axial direction is pushed open to the bolt tip portion and engaged with the male screw thread of the bolt tip portion,
It is characterized by.

　本発明によれば、ナットをボルトの雄螺子部に螺合するため、雌螺子部のナット底面側の一端を雄螺子部の先端部に当接しようとすると、落下防止部の通し口部が雄螺子部の先端部に押し開かれて雄螺子部の外周に圧接するか、または雄螺子山に係合する。これにより、雌螺子部がボルト雄螺子部と螺合し始める前に誤ってナットから指を放しても、落下防止部によりナットの移動が拘束されるので、ナットの落下が防止される。 According to the present invention, since the nut is screwed into the male screw portion of the bolt, if one end of the female screw portion on the nut bottom side is brought into contact with the tip portion of the male screw portion, the through hole portion of the fall prevention portion is It is pushed open at the tip of the male screw part and presses against the outer periphery of the male screw part or engages with the male screw thread. Accordingly, even if the finger is accidentally released from the nut before the female screw portion starts to be screwed with the bolt male screw portion, the movement of the nut is restrained by the fall preventing portion, so that the nut is prevented from falling.

　図１は従来のボルトとナットの使用例を示す説明図である。
　図２は本発明の一実施例に係る圧接部材付のナットの断面図である（実施例１）。
　図３は図２のナットの底面図である。
　図４は圧接部材付のナットの作用説明図である。
　図５は圧接部材付のナットの作用説明図である。
　図６（１）は図２の変形例に係るナットの断面図、（２）は作用説明図である。
　図７は図２の他の変形例の断面図である。
　図８（１）は図２の更に他の変形例に係るナットの断面図、（２）は作用説明図である。
　図９は図２の他の変形例の断面図である。
　図１０（１）は図２の他の変形例に係るナットの断面図、（２）は作用説明図である。
　図１１（１）は図２の更に他の変形例に係るナットの断面図、（２）は（１）中の圧接部材の斜視図、（３）は（１）のナットの作用説明図である。
　図１２（１）は図２の更に他の変形例に係るナットの断面図、（２）は（１）中の係合部材の斜視図、（３）は（１）のナットの作用説明図である。 FIG. 1 is an explanatory view showing an example of using conventional bolts and nuts.
FIG. 2 is a cross-sectional view of a nut with a pressure contact member according to one embodiment of the present invention (Example 1).
FIG. 3 is a bottom view of the nut of FIG.
FIG. 4 is an operation explanatory view of a nut with a pressure contact member.
FIG. 5 is an operation explanatory view of a nut with a pressure contact member.
6A is a cross-sectional view of a nut according to the modification of FIG. 2, and FIG.
FIG. 7 is a cross-sectional view of another modification of FIG.
FIG. 8A is a cross-sectional view of a nut according to still another modified example of FIG. 2, and FIG.
FIG. 9 is a cross-sectional view of another modification of FIG.
FIG. 10A is a cross-sectional view of a nut according to another modification of FIG. 2, and FIG.
11 (1) is a cross-sectional view of a nut according to still another modification of FIG. 2, (2) is a perspective view of a pressure contact member in (1), and (3) is an operation explanatory view of the nut of (1). is there.
12 (1) is a cross-sectional view of a nut according to still another modification of FIG. 2, (2) is a perspective view of an engaging member in (1), and (3) is an explanatory view of the operation of the nut in (1). It is.

　以下、本発明の最良の形態を実施例に基づき説明する。 Hereinafter, the best mode of the present invention will be described based on examples.

　図２、図３を参照して本発明の一実施例を説明する。図２は本発明に係る圧接部材付のナット（ここでは六角ナットとする）の断面図、図３は図２のナットの底面図である。
　図２、図３において、１０はナットであり、鋼、ステンレス鋼などからなるナット本体１１と、ゴム、プラスチック樹脂等の弾性部材により形成された厚みのあるリング状の落下防止部としての圧接部材２０から成る。ナット本体１１は雌螺子孔１２、雌螺子部１３を有している。圧接部材２０は中央に雌螺子部１３の谷径（＝後述するボルトの雄螺子部の山径）Ｌより少しだけ小さい径Ｌ１の通し口部としての通し孔２１を有し、ナット本体１１の内、雌螺子孔１２の開いた底面側の端面１４に、通し孔２１と雌螺子部１３が同軸（同心）となるようにして接着剤により装着されている。
　圧接部材２０の厚みＨは、例えば雌螺子部１３の隣接する螺子山間距離の１乃至５倍前後としてある。圧接部材２０が弾性変形可能なことから、通し孔２１はボルト先端部に対し軸方向に挿脱自在に挿通可能となっている。上記のように構成されたナット１０は図４の鋼、ステンレス鋼などからなるボルト１と組み合わせて使用される。
　図４と図５は上記したナットの使用方法の説明図であり、以下、これらの図を参照して上記した実施例の作用を説明する。なお、図４、図５ではボルト１は水平横向きに配設されて、３枚の板状の締結対象部材１００、１０１、１０２の孔に通されているものとする。
　ナット１０をボルト１に螺合する場合、左手の指でボルト１の頭部２を押さえながら、まず右手の指でナット１０を掴み、圧接部材２０の着いた底面側の端面１４からナット１０をボルト１の雄螺子部３の先端部４に近づけていく（図４（１）参照）。そして、圧接部材２０が雄螺子部３の先端部４に当接したところで（図４（２）参照）、通し孔２１を雄螺子部３の先端部４に押し通すようにして軸方向に挿通する。すると、雄螺子部３の山径Ｌより小さい開口径Ｌ１の通し孔２１は弾性変形により雄螺子部３の先端部４に押し開かれて拡径し、通し孔２１の周縁が雄螺子部３の外周に圧接する（図４（３）参照）。このとき、ナット１０から誤って指を放してしまいナット１０が重力で落下しようとしても、圧接部材２０の通し孔２１と雄螺子部３の先端部４との間に生じる大きな摩擦力により、圧接部材２０が雄螺子部３の先端部４に固定されるので、ナット１０は落下しない。
　なお、圧接部材２０の通し孔２１をボルト１の雄螺子部３の先端部４に挿通すると、ナット１０の軸とボルト１の軸がほぼ一致することから、作業者が軸合わせをする必要は殆どない（図４（３）参照）。
　雄螺子部３の先端部４に対する圧接部材２０の挿通を進め、ナット１０の雌螺子部１３の底面側の一端が雄螺子部３の先端部４に当接したところで、ナット１０の雌螺子部１３を雄螺子部３の先端部４に押し当て、少し回して噛み合わせながらナット１０の雌螺子部１３を雄螺子部３に少し螺合し、次に、指をナット１０から放して指の姿勢を元に戻したのち再びナット１０を指で掴んで少し回し、雄螺子部３に対するナット１０の螺合を進めるという動作を繰り返す（図５（１）、（２）参照）。圧接部材２０の通し孔２１は雄螺子部３により拡径されているので、支障なく螺合することができる。
　若し、雄螺子部３にナット１０の雌螺子部１３が噛み合わないままナット１０から指を放しても、ナット１０に装着された圧接部材２０と雄螺子部３の外周の間に働く摩擦力により落下しない。
　あとは雄螺子部３に対するナット１０の螺合を進め、最終的にレンチを使うなどして規定のトルクで締めればよい。
　ここではボルト１を水平横向きに配設する場合につき説明したが、鉛直下向き（ボルト１の頭部２が上、先端部４が下）に配設する場合にも同様にしてナット１０の落下防止を図ることができる。
　この実施例によれば、ナット１０をボルト１の雄螺子部３に螺合するため、圧接部材２０の通し孔２１の中に雄螺子部３の先端部４を挿通すると、圧接部材２０が弾性変形して通し孔２１が雄螺子部の先端部４に押し開かれて雄螺子部３の外周に圧接する。よって、雄螺子部３にナット１０の雌螺子部１３を螺合させる前に、誤ってナット１０から指を放してしまっても、圧接部材２０が摩擦で雄螺子部３の先端部４に固定されるので、ナット１０はボルト１から落下しない。
　また、圧接部材２０の通し孔２１をボルト１の先端部４に挿通すると、ナット１０の軸とボルト１の軸がほぼ一致するので、軸合わせをするためにナット１０をボルト１の軸に対し垂直方向へ移動調整しなくて済む。
　また、ゴム、プラスチック樹脂等の弾性部材からなる有孔の圧接部材２０をナット１０の底面側の端面１４に装着するだけなので、構成が簡単で済む。
　また、ボルト１には、ナット誘導部の無い一般的なタイプを使用可能である。
　なお、上記した実施例では通常の六角ナットの底面側の端面に圧接部材を装着する場合を例に挙げて説明したが、本発明は何らこれに限定されるものでなく、雌螺子孔の底面側で雌螺子部より底面寄りに落下防止部を設けるようにした種々の変形例が含まれる。
　例えば、図６（１）に示す如く、雌螺子孔１２Ａの底面側に雌螺子部１３の谷径Ｌより孔径Ｌ２の大きな無螺子部１６を有するナット本体１１Ａに対して、底面側の端面１４に、中央に雌螺子部１３の谷径Ｌより少しだけ小さい径Ｌ１の通し孔２１を有し、弾性部材からなるリング状の圧接部材２０を、通し孔２１と雌螺子部１３が同軸となるようにして接着剤等により装着してナット１０Ａを構成しても良い。無螺子部付きのナット１０Ａでは、底面側の無螺子部１６からボルト１の先端部４に挿入するが、まず、圧接部材２０の通し孔２１をボルト１の先端部４に当てて軸方向に挿通すると、通し孔２１は弾性変形により先端部４に押し開かれて通し孔２１の周縁が雄螺子部３の外周に圧接する（図６（２））。従って、ナット１０Ａの雌螺子部１３を雄螺子部３に当てて螺合させる前に、誤って指を放してしまいナット１０Ａが重力で落下しようとしても、圧接部材２０が雄螺子部３の先端部４に固定されるので、ナット１０Ａは落下しない。
　また、図７に示す如く、図６（１）と同様のナット本体１１Ａに対して、底面側の無螺子部１６の中に、中央に雌螺子部１３の谷径Ｌより少しだけ小さい径Ｌ１の通し孔２１を有するリング状の弾性部材からなる圧接部材２０Ｂを、通し孔２１と雌螺子部１３が同軸となるようにして接着剤等により装着してナット１０Ｂを構成しても良い。
　また、図８に示す如く、ナット本体１１Ａに対して、底面側の端面１４に、中央に雌螺子部１３の谷径Ｌより少しだけ小さい径Ｌ１の通し孔２１を有し、外径が端面１４の幅と略同じＬ３に形成されたリング状の弾性部材からなる圧接部材２０Ｃを、通し孔２１と雌螺子部１３が同軸となるようにして接着剤等により装着し、更にこの圧接部材２０Ｃの外側に鋼、ステンレス鋼などのリング状の底板３０を接着剤などで接着してナット１０Ｃを構成しても良い。底板３０は無螺子部１６と同径の丸孔３１を有する。
　また、図９に示す如く、雌螺子孔１２Ｄの内、底面側の無螺子部１６Ｄの部分が深いナット本体１１Ｄに対して、無螺子部１６Ｄに穿設したリング状の溝１７に、中央に雌螺子部１３の谷径Ｌより少しだけ小さい径Ｌ１の通し孔２１を有し、弾性部材からなるリング状の圧接部材２０Ｄを、通し孔２１と雌螺子部１３が同軸となるようにして接着剤等により装着してナット１０Ｄを構成しても良い。
　また、図１０（１）に示す如く、雌螺子孔１２Ｅの内、底面側の無螺子部１６Ｅの部分が深いナット本体１１Ｅに対して、無螺子部１６Ｅに穿設したリング状の溝１７Ｅに、中央に雌螺子部１３の谷径Ｌより少しだけ小さい開口径Ｌ１の通し口部２１Ｅを有し、ゴム、プラスチック樹脂等の弾性部材からなるリングパイプ状の圧接部材２０Ｅを、通し口部２１Ｅと雌螺子部１３が同軸となるようにして接着剤等により装着してナット１０Ｅを構成しても良い。通し口部２１Ｅはボルト１の先端部４に対し軸方向に挿脱自在である。ナット１０Ｅの底面側の無螺子部１６Ｅからボルト１の先端部４に挿入するが、まず、圧接部材２０Ｅの通し口部２１Ｅを先端部４に当てて軸方向に挿通すると、圧接部材２０Ｅが半径方向外側に弾性変形しながら通し口部２１Ｅが先端部４に押し開かれて雄螺子部３の外周に圧接する（図１０（２））。従って、ナット１０Ｅの雌螺子部１３を雄螺子部３に当てて螺合させる前に、誤って指を放してしまいナット１０Ｅが重力で落下しようとしても、圧接部材２０Ｅが雄螺子部３の先端部４に固定されるので、ナット１０Ｅは落下しない。
　上記した実施例及び各変形例において、圧接部材を弾性を有するネオジシート等のマグネットシートにより形成することで、通し口部が圧接と磁着の両方でボルトの雄螺子部の先端部に固定されるようにしても良い。また、通し口部に粘着剤層を付加することにより、粘着力によっても、雄螺子部の先端部に固定されるようにしても良い。
　また、図１１（１）に示す如く、雌螺子孔１２Ｆの底面側に無螺子部１６Ｆを有するナット本体１１Ｆに対して、底面側の端面１４に、無螺子部１６Ｆの孔径Ｌ２より大きい径の溝孔１８を刻設し、この溝孔１８に弾性を有する薄いプラスチック樹脂板や、弾性を有する薄い金属板で形成されたリング状の圧接部材２０Ｆを接着剤等で接着したり、溶接等で一体化したりしてナット１０Ｆを構成しても良い。図１１（２）に示す如く、圧接部材２０Ｆには、放射状に４つの爪部２２が設けられており、各爪部２２は可撓性を有し、軸心に向けて凸となるように半円弧状に湾曲されている。４つの爪部２２の湾曲頂点で囲まれた開口が通し口部２１Ｆを成し、この通し口部２１Ｆは雌螺子部１３と同軸で、谷径Ｌより少しだけ小さい開口径Ｌ１’を有する。通し口部２１Ｆはボルト１の先端部４に対し軸方向に挿脱自在に挿通可能である。ナット１０Ｆの底面側の無螺子部１６Ｆからボルト１の先端部４に挿入するが、まず、圧接部材２０Ｆの通し口部２１Ｆを先端部４に当てて軸方向に挿通すると、各爪部２２が半径方向外側に撓みながら通し口部２１Ｆがボルト１の先端部４に押し開かれて爪部２２の湾曲頂点が雄螺子部３の外周に圧接する（図１１（３））。従って、ナット１０Ｆの雌螺子部１３を雄螺子部３に当てて螺合させる前に、誤って指を放してしまいナット１０Ｆが重力で落下しようとしても、圧接部材２０Ｆが雄螺子部３の先端部４に固定されるので、ナット１０Ｆは落下しない。なお、爪部２２は３つ、或いは５つ以上設けても良い。
　図１１の変形例においても、圧接部材を予め磁化した磁性体により形成することで、通し口部が圧接と磁着の両方でボルトの雄螺子部の先端部に固定されるようにしても良い。また、通し口部に粘着剤層を付加することにより、粘着力によっても、雄螺子部の先端部に固定されるようにしても良い。
　また、上記した実施例及びその変形例では、落下防止部はボルトの雄螺子部の先端部に圧接することで落下防止するようにしたが、本発明は何らこれに限定されず、落下防止部はボルトの雄螺子部の雄螺子山に係合することで、落下防止するようにしても良い。例えば、図１２（１）に示す如く、図１１（１）と同様のナット１１Ｆの底面側の端面１４に、無螺子部１６Ｆの孔径Ｌ２より大きい径の溝孔１８を刻設し、この溝孔１８に弾性を有する薄いプラスチック樹脂板、弾性を有する薄い金属板などで形成されたリング状の落下防止部としての係合部材２００を接着剤等で装着したり、溶接等で一体化したりしてナット１０Ｇを構成するようにしても良い。図１２（２）に示す如く、係合部材２００には、放射状に４つの爪部２０１が設けられており、各爪部２０１は可撓性を有し、軸心に向けて直線的に延設されている。４つの爪部２０１の先端で囲まれた開口が通し口部２０２を成し、この通し口部２０２は雌螺子部１３と同軸で、雌螺子部１３の谷径（ボルトの雄螺子部の山径）Ｌより小さく山径（ボルトの雄螺子部の谷径）Ｌ４より大きい開口径Ｌ１”を有する。通し口部２０２はボルト１の先端部４に対し軸方向に挿脱自在に挿通可能である。ナット１０Ｇの底面側の無螺子部１６Ｆからボルト１の先端部４に挿入するが、まず、係合部材２００の通し口部２０２をボルト１の先端部４に当てて軸方向に挿通すると、各爪部２０２が軸方向に撓みながら通し口部２０２が先端部４に押し開かれて爪部２０１の先端が雄螺子部３の雄螺子山に係合する（図１２（３））。従って、ナット１０Ｇの雌螺子部１３を雄螺子部３に当てて螺合させる前に、誤って指を放してしまいナット１０Ｇが重力で落下しようとしても、係合部材２００が雄螺子部３の先端部４に係止されるので、ナット１０Ｇは落下しない。なお、爪部２０１は３つ、或いは５つ以上設けても良い。
　図１２の変形例においても、係合部材を予め磁化した磁性体により形成することで、通し口部が圧接と磁着の両方でボルトの雄螺子部の先端部に固定されるようにしても良い。また、通し口部に粘着剤層を付加することにより、粘着力によっても、雄螺子部の先端部に固定されるようにしても良い。 An embodiment of the present invention will be described with reference to FIGS. 2 is a cross-sectional view of a nut with a pressure contact member according to the present invention (here, a hexagonal nut), and FIG. 3 is a bottom view of the nut of FIG.
2 and 3, reference numeral 10 denotes a nut, and a pressure contact member as a thick ring-shaped fall prevention portion formed by a nut body 11 made of steel, stainless steel, or the like, and an elastic member such as rubber or plastic resin. It consists of twenty. The nut body 11 has a female screw hole 12 and a female screw part 13. The pressure contact member 20 has a through hole 21 at the center as a through hole portion having a diameter L1 slightly smaller than a valley diameter (= crest diameter of a male screw portion of a bolt described later) L of the female screw portion 13. The through hole 21 and the female screw portion 13 are attached to the end face 14 on the bottom side where the female screw hole 12 is opened by an adhesive so as to be coaxial (concentric).
The thickness H of the pressure contact member 20 is, for example, about 1 to 5 times the distance between adjacent screw threads of the female screw portion 13. Since the pressure contact member 20 can be elastically deformed, the through hole 21 can be inserted into and removed from the bolt tip portion in the axial direction. The nut 10 configured as described above is used in combination with the bolt 1 made of steel, stainless steel, or the like in FIG.
4 and 5 are explanatory views of the method of using the nut described above, and the operation of the above-described embodiment will be described below with reference to these drawings. 4 and 5, it is assumed that the bolt 1 is arranged horizontally and passed through the holes of the three plate-like fastening target members 100, 101, 102.
When the nut 10 is screwed into the bolt 1, while holding the head 2 of the bolt 1 with the finger of the left hand, the nut 10 is first grasped with the finger of the right hand, and the nut 10 is removed from the end surface 14 on the bottom surface side where the pressure contact member 20 is attached. It moves closer to the tip 4 of the male screw part 3 of the bolt 1 (see FIG. 4 (1)). When the pressure contact member 20 comes into contact with the distal end portion 4 of the male screw portion 3 (see FIG. 4 (2)), the through hole 21 is inserted through the distal end portion 4 of the male screw portion 3 in the axial direction. . Then, the through hole 21 having an opening diameter L1 smaller than the mountain diameter L of the male screw part 3 is pushed open by the elastic deformation to the tip part 4 of the male screw part 3, and the peripheral edge of the through hole 21 is the male screw part 3. (See FIG. 4 (3)). At this time, even if the finger is accidentally released from the nut 10 and the nut 10 is about to fall due to gravity, the pressure contact is caused by a large frictional force generated between the through hole 21 of the pressure contact member 20 and the distal end portion 4 of the male screw portion 3. Since the member 20 is fixed to the distal end portion 4 of the male screw portion 3, the nut 10 does not fall.
When the through hole 21 of the pressure contact member 20 is inserted into the tip end portion 4 of the male screw portion 3 of the bolt 1, the axis of the nut 10 and the axis of the bolt 1 substantially coincide with each other. There is almost no (see FIG. 4 (3)).
The insertion of the pressure contact member 20 into the distal end portion 4 of the male screw portion 3 is advanced, and when the one end of the bottom surface side of the female screw portion 13 of the nut 10 comes into contact with the distal end portion 4 of the male screw portion 3, the female screw portion of the nut 10. 13 is pressed against the distal end portion 4 of the male screw portion 3, and the female screw portion 13 of the nut 10 is slightly screwed into the male screw portion 3 while rotating and meshing, and then the finger is released from the nut 10 and the finger After returning the posture, the nut 10 is again grasped with a finger and turned a little, and the operation of advancing the screwing of the nut 10 to the male screw portion 3 is repeated (see FIGS. 5 (1) and (2)). Since the diameter of the through hole 21 of the pressure contact member 20 is increased by the male screw portion 3, it can be screwed together without any trouble.
Even if the female screw portion 13 of the nut 10 is not meshed with the male screw portion 3 and the finger is released from the nut 10, the frictional force acting between the press contact member 20 attached to the nut 10 and the outer periphery of the male screw portion 3. Do not fall by.
Then, the nut 10 may be screwed into the male screw portion 3 and finally tightened with a prescribed torque by using a wrench.
Although the case where the bolt 1 is disposed horizontally and horizontally has been described here, the nut 10 can be prevented from dropping in the same manner when the bolt 1 is disposed vertically downward (the head 2 of the bolt 1 is up and the tip 4 is down). Can be achieved.
According to this embodiment, when the nut 10 is screwed into the male screw portion 3 of the bolt 1, when the distal end portion 4 of the male screw portion 3 is inserted into the through hole 21 of the pressure contact member 20, the pressure contact member 20 is elastic. The through hole 21 is deformed and is pushed open to the distal end portion 4 of the male screw portion and press-contacts with the outer periphery of the male screw portion 3. Therefore, even if the finger 10 is accidentally released before the female screw portion 13 of the nut 10 is screwed into the male screw portion 3, the pressure contact member 20 is fixed to the distal end portion 4 of the male screw portion 3 by friction. Therefore, the nut 10 does not fall from the bolt 1.
Further, when the through hole 21 of the pressure contact member 20 is inserted into the tip 4 of the bolt 1, the axis of the nut 10 and the axis of the bolt 1 substantially coincide with each other. There is no need to adjust the vertical movement.
Further, since the perforated pressure contact member 20 made of an elastic member such as rubber or plastic resin is simply attached to the end surface 14 on the bottom surface side of the nut 10, the configuration is simple.
Moreover, the bolt 1 can use the general type without a nut induction | guidance | derivation part.
In the above-described embodiment, the case where the pressure contact member is attached to the bottom end surface of the normal hexagon nut has been described as an example. However, the present invention is not limited to this, and the bottom surface of the female screw hole is not limited thereto. Various modifications are provided in which the fall prevention portion is provided closer to the bottom surface than the female screw portion on the side.
For example, as shown in FIG. 6 (1), an end face 14 on the bottom surface side with respect to a nut body 11A having a screwless portion 16 having a hole diameter L2 larger than the valley diameter L of the female screw portion 13 on the bottom surface side of the female screw hole 12A. In addition, a through hole 21 having a diameter L1 that is slightly smaller than the valley diameter L of the female screw portion 13 is provided at the center, and a ring-shaped press contact member 20 made of an elastic member is provided. The through hole 21 and the female screw portion 13 are coaxial. In this manner, the nut 10A may be configured by being attached with an adhesive or the like. In the nut 10 </ b> A with a screwless portion, the bottom-side screwless portion 16 is inserted into the tip portion 4 of the bolt 1. First, the through hole 21 of the pressure contact member 20 is applied to the tip portion 4 of the bolt 1 in the axial direction. When inserted, the through-hole 21 is pushed open to the distal end portion 4 by elastic deformation, and the periphery of the through-hole 21 comes into pressure contact with the outer periphery of the male screw portion 3 (FIG. 6 (2)). Accordingly, even if the finger 10 is accidentally released before the female screw portion 13 of the nut 10A is screwed onto the male screw portion 3 and the nut 10A is about to fall due to gravity, the press contact member 20 is moved to the tip of the male screw portion 3. Since it is fixed to the portion 4, the nut 10A does not fall.
Further, as shown in FIG. 7, a diameter L1 slightly smaller than the valley diameter L of the female screw portion 13 in the middle of the screwless portion 16 on the bottom surface side with respect to the nut body 11A similar to FIG. The nut 10B may be configured by mounting the pressure contact member 20B made of a ring-shaped elastic member having the through hole 21 with an adhesive or the like so that the through hole 21 and the female screw portion 13 are coaxial.
Further, as shown in FIG. 8, the nut body 11 </ b> A has a through hole 21 having a diameter L <b> 1 slightly smaller than the valley diameter L of the female screw portion 13 in the center on the end surface 14 on the bottom surface side, and the outer diameter is the end surface. A pressure contact member 20C made of a ring-shaped elastic member formed in L3 substantially the same as the width 14 is mounted with an adhesive or the like so that the through-hole 21 and the female screw portion 13 are coaxial, and this pressure contact member 20C. The nut 10C may be configured by bonding a ring-shaped bottom plate 30 such as steel or stainless steel with an adhesive or the like on the outer side. The bottom plate 30 has a round hole 31 having the same diameter as the screwless portion 16.
Further, as shown in FIG. 9, a ring-shaped groove 17 formed in the screwless portion 16D is formed in the center of the nut body 11D where the screwless portion 16D on the bottom side of the female screw hole 12D is deep. A through hole 21 having a diameter L1 slightly smaller than the valley diameter L of the female screw portion 13 is bonded, and a ring-shaped pressure contact member 20D made of an elastic member is bonded so that the through hole 21 and the female screw portion 13 are coaxial. The nut 10 </ b> D may be configured by mounting with an agent or the like.
Further, as shown in FIG. 10 (1), in the female screw hole 12E, the non-threaded portion 16E on the bottom side is deeper than the nut body 11E. A ring pipe-shaped press contact member 20E made of an elastic member such as rubber or plastic resin is provided at the center with a through hole 21E having an opening diameter L1 that is slightly smaller than the valley diameter L of the female screw part 13. The nut 10E may be configured by attaching with an adhesive or the like so that the female screw portion 13 is coaxial. The through hole 21E is detachable in the axial direction with respect to the tip 4 of the bolt 1. The nut 10E is inserted into the front end portion 4 of the bolt 1 from the screwless portion 16E on the bottom surface side. First, when the passage portion 21E of the press contact member 20E is applied to the front end portion 4 and inserted in the axial direction, the press contact member 20E has a radius. The through hole 21E is pushed open to the tip 4 while being elastically deformed outward in the direction, and is pressed against the outer periphery of the male screw 3 (FIG. 10 (2)). Accordingly, even if the finger 10 is accidentally released before the female screw portion 13 of the nut 10E is screwed onto the male screw portion 3 and the nut 10E tries to fall due to gravity, the pressure contact member 20E is not moved to the tip of the male screw portion 3. Since it is fixed to the portion 4, the nut 10E does not fall.
In the above-described embodiments and modifications, the pressure contact member is formed of a magnetic sheet such as an elastic neody sheet, so that the through hole is fixed to the tip of the male screw portion of the bolt by both pressure contact and magnetic attachment. You may do it. Moreover, you may make it fix to the front-end | tip part of a male screw part also by adhesive force by adding an adhesive layer to a through-mouth part.
Further, as shown in FIG. 11A, the nut main body 11F having the screwless portion 16F on the bottom surface side of the female screw hole 12F has a diameter larger than the hole diameter L2 of the screwless portion 16F on the end surface 14 on the bottom surface side. A groove 18 is formed, and a ring-shaped pressure contact member 20F formed of a thin plastic resin plate having elasticity or a thin metal plate having elasticity is adhered to the groove 18 with an adhesive or the like. The nut 10F may be configured by integrating them. As shown in FIG. 11 (2), the pressure contact member 20F is provided with four claw portions 22 radially, and each claw portion 22 has flexibility and is convex toward the axis. Curved in a semicircular arc shape. An opening surrounded by the curved vertices of the four claw portions 22 forms a through hole portion 21F. The through hole portion 21F is coaxial with the female screw portion 13 and has an opening diameter L1 ′ that is slightly smaller than the valley diameter L. The through hole 21F can be inserted into and removed from the tip 4 of the bolt 1 in the axial direction. The nut 10F is inserted into the front end portion 4 of the bolt 1 from the screwless portion 16F on the bottom surface side. First, when the passage portion 21F of the pressure contact member 20F is applied to the front end portion 4 and inserted in the axial direction, each claw portion 22 is inserted. The through hole 21F is pushed open to the tip 4 of the bolt 1 while bending outward in the radial direction, and the curved apex of the claw 22 is pressed against the outer periphery of the male screw 3 (FIG. 11 (3)). Therefore, before the female screw portion 13 of the nut 10F is brought into contact with the male screw portion 3 and screwed, the finger is accidentally released and the nut 10F attempts to drop due to gravity. Since it is fixed to the portion 4, the nut 10F does not fall. Note that three or five or more claw portions 22 may be provided.
In the modified example of FIG. 11 as well, the through-hole portion may be fixed to the front end portion of the male screw portion of the bolt by both the press-contact and the magnetic attachment by forming the press-contact member with a magnetic material magnetized in advance. . Moreover, you may make it fix to the front-end | tip part of a male screw part also by adhesive force by adding an adhesive layer to a through-mouth part.
Further, in the above-described embodiment and its modification, the fall prevention part is prevented from falling by being pressed against the tip of the male screw part of the bolt, but the present invention is not limited to this, and the fall prevention part May be prevented from falling by engaging with the male screw thread of the male screw part of the bolt. For example, as shown in FIG. 12 (1), a groove hole 18 having a diameter larger than the hole diameter L2 of the screwless portion 16F is formed on the end surface 14 on the bottom surface side of the nut 11F similar to FIG. 11 (1). An engagement member 200 as a ring-shaped fall prevention portion formed of a thin plastic resin plate having elasticity, a thin metal plate having elasticity, or the like is attached to the hole 18 with an adhesive or the like, or integrated by welding or the like. The nut 10G may be configured. As shown in FIG. 12 (2), the engaging member 200 is provided with four claw portions 201 radially, and each claw portion 201 has flexibility and extends linearly toward the axis. It is installed. An opening surrounded by the tips of the four claw portions 201 forms a through-hole portion 202. The through-hole portion 202 is coaxial with the female screw portion 13, and has a valley diameter of the female screw portion 13 (the peak of the male screw portion of the bolt). It has an opening diameter L1 "that is smaller than the diameter L and larger than the peak diameter (valley diameter of the male screw portion of the bolt) L4. The through-hole portion 202 can be inserted into and removed from the tip portion 4 of the bolt 1 in the axial direction. The nut 10G is inserted into the front end portion 4 of the bolt 1 from the screwless portion 16F on the bottom side, but first, when the through-hole portion 202 of the engagement member 200 is applied to the front end portion 4 of the bolt 1 and inserted in the axial direction. While the claw portions 202 are bent in the axial direction, the through-hole portion 202 is pushed open to the tip portion 4 and the tip of the claw portion 201 is engaged with the male screw thread of the male screw portion 3 (FIG. 12 (3)). Therefore, before the female screw portion 13 of the nut 10G is brought into contact with the male screw portion 3 and screwed, Even if the nut 10G is about to fall due to gravity, the engaging member 200 is locked to the distal end portion 4 of the male screw portion 3, so that the nut 10G does not fall. Five or more may be provided.
Also in the modified example of FIG. 12, the engaging member is formed of a pre-magnetized magnetic body so that the through hole is fixed to the tip of the male screw portion of the bolt by both pressure welding and magnetic attachment. good. Moreover, you may make it fix to the front-end | tip part of a male screw part also by adhesive force by adding an adhesive layer to a through-mouth part.

　本発明は、六角ナット、袋ナット、ツバ付ナット（フランジ付ナット）などに適用できる。 The present invention can be applied to hexagon nuts, cap nuts, nuts with flanges (nuts with flanges), and the like.

　１　ボルト
　３　雄螺子部
　１０　ナット
　１１　ナット本体
　２０　圧接部材
　２１　通し孔
　２００　係合部材 DESCRIPTION OF SYMBOLS 1 Bolt 3 Male screw part 10 Nut 11 Nut main body 20 Pressure contact member 21 Through-hole 200 Engagement member

Claims (2)

　ナット本体の雌螺子孔の底面近くに落下防止部を設け、
　この際、落下防止部は、ナット本体の雌螺子部の内、ナット本体の底面側の一端より底面寄りに位置するようにし、
　落下防止部に雌螺子と同心で開口径が雌螺子部の谷径より小さい通し口部を設け、
　この通し口部はボルト先端部に対し軸方向に挿通可能とするとともに、ナット本体をボルトに螺合させるため、ナット本体の雌螺子部の内、ナット本体の底面側の一端をボルト先端部に当接する際、ボルト先端部に軸方向に挿通された通し口部が当該ボルト先端部に押し開かれてボルト先端部の外周に圧接するようにしたこと、
　を特徴とするナット。 A drop prevention part is provided near the bottom of the female screw hole in the nut body,
At this time, the fall prevention portion is located closer to the bottom surface than one end of the bottom surface side of the nut body, among the female screw portions of the nut body,
The fall prevention part is provided with a through hole that is concentric with the female screw and whose opening diameter is smaller than the valley diameter of the female screw part,
The through-hole portion can be inserted into the bolt tip portion in the axial direction, and in order to screw the nut body into the bolt, one end of the nut main body on the bottom side of the nut body is used as the bolt tip portion. When abutting, the through hole inserted in the bolt tip portion in the axial direction is pushed open to the bolt tip portion and pressed against the outer periphery of the bolt tip portion,
Nut featuring. 　ナット本体の雌螺子孔の底面近くに落下防止部を設け、
　この際、落下防止部は、ナット本体の雌螺子部の内、ナット本体の底面側の一端より底面寄りに位置するようにし、
　落下防止部に、雌螺子部と同心で開口径が雌螺子部の谷径より小さい通し口部を設け、
　この通し口部はボルト先端部に対し軸方向に挿通可能とするとともに、ナット本体をボルトに螺合させるため、ナット本体の雌螺子部の内、ナット本体の底面側の一端をボルト先端部に当接する際、ボルト先端部に軸方向に挿通された通し口部が当該ボルト先端部に押し開かれてボルト先端部の雄螺子山に係合するようにしたこと、
　を特徴とするナット。 A drop prevention part is provided near the bottom of the female screw hole in the nut body,
At this time, the fall prevention portion is located closer to the bottom surface than one end of the bottom surface side of the nut body, among the female screw portions of the nut body,
The fall prevention part is provided with a through-hole part that is concentric with the female screw part and whose opening diameter is smaller than the valley diameter of the female screw part,
The through-hole portion can be inserted into the bolt tip portion in the axial direction, and in order to screw the nut body into the bolt, one end of the nut main body on the bottom side of the nut body is used as the bolt tip portion. When abutting, the through hole inserted in the bolt tip portion in the axial direction is pushed open to the bolt tip portion and engaged with the male screw thread of the bolt tip portion,
Nut featuring.
PCT/JP2016/058618 2015-03-13 2016-03-10 Nut Ceased WO2016148266A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-51478 2015-03-13
JP2015051478A JP5816767B1 (en) 2015-03-13 2015-03-13 nut

Publications (1)

Publication Number Publication Date
WO2016148266A1 true WO2016148266A1 (en) 2016-09-22

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6538947B1 (en) * 2018-10-18 2019-07-03 共和ゴム株式会社 Bolt nut protection cap
JP7517288B2 (en) * 2021-09-10 2024-07-17 株式会社島津製作所 Vacuum Equipment
WO2023089854A1 (en) * 2021-11-19 2023-05-25 因幡電機産業株式会社 Pipe support member

Citations (4)

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JP2001159415A (en) * 1999-12-01 2001-06-12 Kishiwada Stainless Kk Device for preventing nut from coming off
JP2002372024A (en) * 2001-06-18 2002-12-26 Fuji Seimitsu:Kk Nut
JP2013133923A (en) * 2011-12-27 2013-07-08 Yazaki Corp Screw looseness preventive structure
JP2014056514A (en) * 2012-09-13 2014-03-27 Toyoda Iron Works Co Ltd Mounting part structure of vehicle pedal bracket

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3390155B2 (en) * 1999-10-22 2003-03-24 株式会社冨士精密 nut
JP2003278733A (en) * 2002-01-17 2003-10-02 Katsumi Ikeda Fixing method for plurality of fastening members, fixing method for plurality of members, and fastening member
JP2005009536A (en) * 2003-06-17 2005-01-13 Mamoru Ueno Functional fastener

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001159415A (en) * 1999-12-01 2001-06-12 Kishiwada Stainless Kk Device for preventing nut from coming off
JP2002372024A (en) * 2001-06-18 2002-12-26 Fuji Seimitsu:Kk Nut
JP2013133923A (en) * 2011-12-27 2013-07-08 Yazaki Corp Screw looseness preventive structure
JP2014056514A (en) * 2012-09-13 2014-03-27 Toyoda Iron Works Co Ltd Mounting part structure of vehicle pedal bracket

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