WO2010086962A1 - Female screw member - Google Patents

Female screw member Download PDF

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Publication number
WO2010086962A1
WO2010086962A1 PCT/JP2009/051311 JP2009051311W WO2010086962A1 WO 2010086962 A1 WO2010086962 A1 WO 2010086962A1 JP 2009051311 W JP2009051311 W JP 2009051311W WO 2010086962 A1 WO2010086962 A1 WO 2010086962A1
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WO
WIPO (PCT)
Prior art keywords
screw member
female screw
male screw
female
cylindrical portion
Prior art date
Application number
PCT/JP2009/051311
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French (fr)
Japanese (ja)
Inventor
泰史 伊藤
Original Assignee
Ｎｅｃディスプレイソリューションズ株式会社
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Priority to PCT/JP2009/051311 priority Critical patent/WO2010086962A1/en
Publication of WO2010086962A1 publication Critical patent/WO2010086962A1/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
    • F16B37/00—Nuts or like thread-engaging members
    • F16B37/12—Nuts or like thread-engaging members with thread-engaging surfaces formed by inserted coil-springs, discs, or the like; Independent pieces of wound wire used as nuts; Threaded inserts for holes
    • F16B37/122—Threaded inserts, e.g. "rampa bolts"
    • 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
    • F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
    • F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
    • F16B35/041—Specially-shaped shafts
    • F16B35/044—Specially-shaped ends
    • F16B35/047—Specially-shaped ends for preventing cross-threading, i.e. preventing skewing of bolt and nut

Definitions

  • the present invention relates to a female screw member capable of screwing a male screw member.
  • FIG. 1A is a perspective view showing a state before a male screw member is screwed into a general female screw member
  • FIG. 1B is a cross-sectional view taken along the line A-A ′ of FIG. 1A.
  • the female screw member 114 is an insert nut that is fitted and fixed to the housing 101.
  • the central axis a of the male screw member 102 needs to coincide with the central axis b of the female screw member 114.
  • the female screw member 114 is installed with the central axis b directed in various directions according to individual cases. Therefore, it is often not easy to make the central axis a of the male screw member 102 coincide with the central axis b of the female screw member 114.
  • the male screw member 102 when the male screw member 102 is screwed into the female screw member 114 with the central axis a of the male screw member 102 inclined with respect to the central axis b of the female screw member 114, the male screw member 102 and the female screw member In some cases, the male screw member 102 does not normally engage with the female screw member 114 and the female screw member 114 does not enter the female screw member 114 until the end.
  • Japanese Patent Laid-Open No. 2002-48120 discloses a male screw member that can be normally screwed into a female screw member having a correspondingly shaped female screw portion.
  • This male screw member is provided with a guide portion adjacent to the tip of the male screw portion on which the thread is formed.
  • the guide portion is concentric with the male screw portion, and has an outer diameter substantially equal to the valley diameter of the male screw portion at one end on the male screw portion side, and is formed so that the outer diameter becomes narrower as the distance from the male screw portion increases. Yes.
  • a boss-shaped portion protrudes from the other end of the guide portion.
  • the central axis of the male screw portion of the male screw member can be aligned with the central axis of the female screw portion of the female screw member by sequentially inserting the boss shape portion and the guide portion into the female screw portion of the female screw member. Therefore, the male screw member can be normally screwed into the female screw member.
  • the shape of the male screw member is standardized by standardization. Therefore, the above-described technique that requires the male screw member to be processed into a special shape requires high cost.
  • Japanese Patent Application Laid-Open No. 2-113110 discloses a female screw member capable of normally screwing a male screw member having a male screw portion of a corresponding shape.
  • This female screw member is provided with a counterbore portion having a diameter larger than the valley diameter of the female screw portion in which the screw groove is formed.
  • This counterbore part is provided eccentrically with respect to the female thread part such that the positioning part on the side surface circumscribes the cylindrical surface passing through the bottom of the thread groove of the female thread part.
  • the central axis of the male screw member can be aligned with the central axis of the female screw member by bringing the screw thread of the male screw member into contact with the positioning portion of the counterbore part. Therefore, this female screw member can be normally screwed into the male screw member.
  • An object of the present invention is to provide a female screw member that can easily and reliably screw a male screw member normally.
  • An internal thread member includes an internal thread portion into which an external thread member can be screwed, a concentricity with the internal thread portion, adjacent to an end portion of the internal thread portion on the front side in the screwing direction of the external thread member into the internal thread portion, and a thread groove And a cylindrical portion formed at a uniform height without providing the.
  • FIG. 1B is a cross-sectional view taken along line A-A ′ in the vicinity of the female screw member shown in FIG. 1A. It is the perspective view which showed the state before inserting a male screw member in the female screw member which concerns on one Embodiment of this invention.
  • FIG. 2B is a cross-sectional view taken along line B-B ′ in the vicinity of the female screw member shown in FIG. 2A.
  • FIG. 2B is a cross-sectional view taken along line B-B ′ in the vicinity of the female screw member shown in FIG. 2A.
  • FIG. 2B is a cross-sectional view taken along line B-B ′ in the vicinity of the female screw member shown in FIG. 2A.
  • FIG. 2B is a cross-sectional view taken along line B-B ′ in which the female screw member shown in FIG. 2A is enlarged. It is the perspective view which showed the state after inserting the external thread part of an external thread member in the cylindrical part of the internal thread member shown to FIG. 2A.
  • FIG. 4B is a cross-sectional view taken along the line C-C ′ in the vicinity of the female screw member shown in FIG. 4A.
  • FIG. 2A is a perspective view showing a state before the male screw member is inserted into the female screw member according to the embodiment of the present invention
  • FIG. 2B is a cross-sectional view taken along line B-B ′ of FIG. 2A.
  • the female screw member 14 is an insert nut that can be used when it is necessary to screw a general male screw member into a resin molded product or a sheet metal.
  • the female screw member 14 has a fixing portion 14d provided so as to protrude from the outer peripheral surface in order to be fixed to the external member.
  • the female screw member 14 is attached to the cylindrical boss-shaped portion 1a of the casing 1 which is an external member made of plastic by a technique such as hot press fitting.
  • the female screw member 14 is provided with a female screw portion 14a capable of screwing the male screw portion 2a of the male screw member 2 standardized with respect to the male screw shape in the direction of the central axis b.
  • the male screw member 2 will be described as an example of a standardized male screw member.
  • the female screw portion 14a of the female screw member 14 is changed to various shapes according to the male screw shape of the male screw member to be used. Therefore, it can be applied to various male screw members.
  • male screw member 2 for example, International Organization for Standardization (ISO), Japanese Industrial Standards (JIS), Standard Standard by American National Standards) is used by American Standards (ANSI). be able to.
  • ISO International Organization for Standardization
  • JIS Japanese Industrial Standards
  • ANSI American Standards
  • FIG. 3 is a cross-sectional view taken along the line B-B ′ showing the female screw member 14 shown in FIG. 2A in an enlarged manner.
  • the end portion of the female screw portion 14a on the front side in the screwing direction of the male screw portion 2a into the female screw portion 14a is formed along a surface substantially perpendicular to the central axis b of the female screw portion 14a.
  • the female screw member 14 is concentric with the female screw portion 14a, is adjacent to the end of the female screw portion 14a on the front side of the male screw portion 2a in the screwing direction, and has a cylindrical portion 14b formed at a uniform height T without providing a screw groove. Is provided.
  • the cylindrical portion 14b has an inner diameter m substantially the same as the valley diameter n of the female screw portion 14a over the entire direction of the central axis b.
  • the inner diameter m of the cylindrical portion 14b is not necessarily the same as the valley diameter n of the female screw portion 14a.
  • the cylindrical portion 14b has an inner diameter m that is 0.1 mm larger than the valley diameter n of the female screw portion 14a. May be.
  • the cylindrical portion 14b has a height T, which is the length in the direction of the central axis b, exceeding twice the pitch P of the female screw portion 14a, which is the interval between the tops of the adjacent screw threads of the female screw portion 14a, and 5 It is formed to be less than double.
  • the height T of the cylindrical portion 14b is substantially the same over the entire circumference of the inner surface.
  • the female screw member 14 is provided with an inclined portion 14c adjacent to the cylindrical portion 14b on the front side in the screwing direction of the male screw portion 2a into the female screw portion 14a.
  • the inner surface of the inclined portion 14c is formed to be continuous with the inner surface of the cylindrical portion 14b so that the inner diameter increases as the distance from the cylindrical portion 14b increases.
  • the inclined portion 14c is formed by, for example, forming the cylindrical portion 14b longer by the height in the direction of the central axis b of the inclined portion 14c and chamfering the inner surface of the end portion of the cylindrical portion 14b on the front side in the screwing direction. To do.
  • the male screw portion 2 a of the male screw member 2 is first screwed into the female screw portion 14 a of the female screw member 14 after being inserted into the cylindrical portion 14 b of the female screw member 14.
  • the male screw portion 2a of the male screw member 2 is inserted into the cylindrical portion 14b in a state where the cross hole of the head 2b is engaged with the cross bit 3 magnetized by the driver and temporarily fixed by a magnetic force.
  • the male screw portion 2a is inserted into the cylindrical portion 14b, as shown in FIG. 2C, even when the central axis a of the male screw portion 2a is inclined with respect to the central axis b of the female screw portion 14a, the male screw portion 2a is inclined. 14c smoothly guides into the cylindrical portion 14b.
  • FIG. 4A is a perspective view showing a state after the male screw member 2 is inserted into the cylindrical portion 14b of the female screw member 14, and FIG. 4B is a cross-sectional view taken along the line C-C 'of FIG. 4A.
  • the inner diameter m of the cylindrical portion 14b is substantially the same as the valley diameter n of the female screw portion 14a that meshes with the screw thread of the male screw portion 2a of the male screw member 2. Therefore, the external thread portion 2a is accommodated in the cylindrical portion 14b with the outer periphery of the screw thread meshing with the thread groove of the female screw portion 14a being substantially free from the inner surface of the cylindrical portion 14b over the entire periphery. .
  • the outer periphery of the thread of the male screw portion 2a formed in the direction of the central axis a of the male screw portion 2a is parallel to the central axis b of the female screw portion 14b. It is aligned along the inner surface. Thereby, the central axis a of the external thread part 2a and the central axis b of the internal thread part 14a are made to correspond.
  • the end portion of the female screw member 14 on the cylindrical portion 14b side is formed along a surface substantially perpendicular to the central axis b, when the male screw portion 2a is inserted into the cylindrical portion 14b, the male screw portion The position of the male screw member 2 is regulated by coming into contact with the outer edge of the tip of 2a.
  • the male screw member 2 After inserting the male screw portion 2a into the cylindrical portion 14b, the male screw member 2 is rotated around the central axis a together with the cross bit 3 of the driver. Since the central axis a of the male screw portion 2a and the central axis b of the female screw portion 14a coincide with each other, when the male screw member 2 is rotated around the central axis a, the male screw portion 2a and the female screw portion 14a are normally engaged with each other. Accordingly, the male screw portion 2a can be normally screwed into the female screw portion 14a in the direction of the central axis b.
  • the fixed member is sandwiched and fixed between the head 2b of the male screw member 2 and the female screw member 14.
  • the fixed member is omitted.
  • the male screw portion 2a when the male screw portion 2a is inserted into the cylindrical portion 14b, there is a slight gap between the outer periphery of the thread of the male screw portion 2a and the inner surface of the cylindrical portion 14b. a may be slightly inclined with respect to the central axis b of the female screw portion 14a. However, by forming the height T of the cylindrical portion 14b to exceed twice the pitch P of the female screw portion 14a, a slight gap between the outer periphery of the thread of the male screw portion 2a and the inner surface of the cylindrical portion 14b.
  • the male screw portion 2a and the female screw portion 14a can be normally engaged with each other without being affected by the above.
  • the height T of the cylindrical portion 14b of the female screw member 14 is made longer. desirable. However, the longer the height T of the cylindrical portion 14b, the shorter the portion of the male screw portion 2a of the male screw member 2 that meshes with the female screw portion 14a of the female screw member 14. Thereby, the force which fixes the to-be-fixed thing of the external thread member 2 to the internal thread member 14 becomes weak.
  • the female screw member 14 is formed such that the height T of the cylindrical portion 14b exceeds twice the pitch P of the female screw portion 14a and is five times or less.
  • the height T of the cylindrical portion 14b can suppress the influence of a slight gap between the outer periphery of the thread of the male screw portion 2a and the inner surface of the cylindrical portion 14b according to the type of the object to be fixed, and It is possible to appropriately change within a range in which a sufficient force for fixing the fixed object of the male screw member 2 to the female screw member 14 can be obtained.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Abstract

A female screw member (14) is provided with a female thread section (14a) with which a male screw member (2) can be engaged, and also with a circular tube section (14b) coaxial with the female thread section (14a), adjacent to that end of the female thread section (14a) at which the engagement of the male screw member (2) with the female thread section (14a) starts, and formed with a uniform height without forming a screw groove therein.

Description

雌ねじ部材Female thread member
　本発明は、雄ねじ部材をねじ込み可能な雌ねじ部材に関する。 The present invention relates to a female screw member capable of screwing a male screw member.
　図１Ａは一般的な雌ねじ部材に雄ねじ部材をねじ込む前の状態を示した斜視図であり、図１Ｂは図１ＡのＡ－Ａ’線に沿った断面図である。雌ねじ部材１１４は、筐体１０１に嵌め込まれて固定されたインサートナットである。 FIG. 1A is a perspective view showing a state before a male screw member is screwed into a general female screw member, and FIG. 1B is a cross-sectional view taken along the line A-A ′ of FIG. 1A. The female screw member 114 is an insert nut that is fitted and fixed to the housing 101.
　雄ねじ部材１０２を雌ねじ部材１１４にドライバの十字ビット１０３を係合させてねじ込むとき、雄ねじ部材１０２の中心軸ａを雌ねじ部材１１４の中心軸ｂと一致させる必要がある。しかし、雌ねじ部材１１４は、個々の場合に応じて、中心軸ｂが様々な方向に向けられて設置される。したがって、雄ねじ部材１０２の中心軸ａを雌ねじ部材１１４の中心軸ｂと一致させることは容易でない場合が多い。 When the male screw member 102 is screwed by engaging the cross bit 103 of the driver with the female screw member 114, the central axis a of the male screw member 102 needs to coincide with the central axis b of the female screw member 114. However, the female screw member 114 is installed with the central axis b directed in various directions according to individual cases. Therefore, it is often not easy to make the central axis a of the male screw member 102 coincide with the central axis b of the female screw member 114.
　図１Ａおよび図１Ｂに示すように、雄ねじ部材１０２の中心軸ａが雌ねじ部材１１４の中心軸ｂに対して傾いた状態で、雄ねじ部材１０２を雌ねじ部材１１４にねじ込むと、雄ねじ部材１０２と雌ねじ部材１１４とが正常に噛み合わずに雄ねじ部材１０２が雌ねじ部材１１４に対して最後まで入り込まず締め込み不良になることがある。 As shown in FIGS. 1A and 1B, when the male screw member 102 is screwed into the female screw member 114 with the central axis a of the male screw member 102 inclined with respect to the central axis b of the female screw member 114, the male screw member 102 and the female screw member In some cases, the male screw member 102 does not normally engage with the female screw member 114 and the female screw member 114 does not enter the female screw member 114 until the end.
　特開２００２－４８１２０号公報に、対応する形状の雌ねじ部を有する雌ねじ部材に正常にねじ込むことができる雄ねじ部材が開示されている。 Japanese Patent Laid-Open No. 2002-48120 discloses a male screw member that can be normally screwed into a female screw member having a correspondingly shaped female screw portion.
　この雄ねじ部材には、ねじ山が形成された雄ねじ部の先端に隣接しているガイド部が設けられている。このガイド部は、雄ねじ部と同心であり、雄ねじ部側の一方の端部では雄ねじ部の谷径とほぼ等しい外径を有し、雄ねじ部から離れるにつれて外径が細くなるように形成されている。またガイド部の他方の端部には、ボス形状部が突出して設けられている。 This male screw member is provided with a guide portion adjacent to the tip of the male screw portion on which the thread is formed. The guide portion is concentric with the male screw portion, and has an outer diameter substantially equal to the valley diameter of the male screw portion at one end on the male screw portion side, and is formed so that the outer diameter becomes narrower as the distance from the male screw portion increases. Yes. A boss-shaped portion protrudes from the other end of the guide portion.
　この雄ねじ部材では、ボス形状部およびガイド部を雌ねじ部材の雌ねじ部に順次挿入していくことにより、雄ねじ部材の雄ねじ部の中心軸を雌ねじ部材の雌ねじ部の中心軸に合わせることができる。したがって、この雄ねじ部材は雌ねじ部材に正常にねじ込むことができる。 In this male screw member, the central axis of the male screw portion of the male screw member can be aligned with the central axis of the female screw portion of the female screw member by sequentially inserting the boss shape portion and the guide portion into the female screw portion of the female screw member. Therefore, the male screw member can be normally screwed into the female screw member.
　しかしながら、一般的に、雄ねじ部材は規格化により形状の統一が図られている。そのため、雄ねじ部材を特殊な形状に加工する必要がある上記の技術は高いコストを要する。 However, in general, the shape of the male screw member is standardized by standardization. Therefore, the above-described technique that requires the male screw member to be processed into a special shape requires high cost.
　一方、特開平２－１１３１１０号公報には、対応する形状の雄ねじ部を有する雄ねじ部材を正常にねじ込むことができる雌ねじ部材が開示されている。 On the other hand, Japanese Patent Application Laid-Open No. 2-113110 discloses a female screw member capable of normally screwing a male screw member having a male screw portion of a corresponding shape.
　この雌ねじ部材には、ねじ溝が形成された雌ねじ部の谷径よりも大径の座ぐり部が設けられている。この座ぐり部は、雌ねじ部のねじ溝の底を通る円筒面に側面の位置決め部が外接するように、雌ねじ部に対して偏心して設けられている。 This female screw member is provided with a counterbore portion having a diameter larger than the valley diameter of the female screw portion in which the screw groove is formed. This counterbore part is provided eccentrically with respect to the female thread part such that the positioning part on the side surface circumscribes the cylindrical surface passing through the bottom of the thread groove of the female thread part.
　この雌ねじ部材では、座ぐり部の位置決め部に雄ねじ部材のねじ山を当接させることにより、雄ねじ部材の中心軸を雌ねじ部材の中心軸に合わせることができる。したがって、この雌ねじ部材は雄ねじ部材に正常にねじ込まれることができる。 In this female screw member, the central axis of the male screw member can be aligned with the central axis of the female screw member by bringing the screw thread of the male screw member into contact with the positioning portion of the counterbore part. Therefore, this female screw member can be normally screwed into the male screw member.
　しかしながら、この雌ねじ部材では、雄ねじ部材のねじ山を座ぐり部の位置決め部に正確に当接させることは難しく、雄ねじ部材の中心軸が雌ねじ部材の中心軸からずれる場合がある。この場合には、雄ねじ部材と雌ねじ部材とが正常に噛み合わないことがある。 However, in this female screw member, it is difficult to accurately contact the thread of the male screw member with the positioning portion of the counterbore portion, and the central axis of the male screw member may deviate from the central axis of the female screw member. In this case, the male screw member and the female screw member may not normally mesh with each other.
　本発明の目的は、容易かつ確実に雄ねじ部材を正常にねじ込むことができる雌ねじ部材を提供することにある。 An object of the present invention is to provide a female screw member that can easily and reliably screw a male screw member normally.
　本発明による雌ねじ部材は、雄ねじ部材をねじ込み可能な雌ねじ部と、前記雌ねじ部と同心で、前記雄ねじ部材の前記雌ねじ部へのねじ込み方向手前側の前記雌ねじ部の端部に隣接し、ねじ溝を設けずに均一な高さに形成された円筒部と、を有する。 An internal thread member according to the present invention includes an internal thread portion into which an external thread member can be screwed, a concentricity with the internal thread portion, adjacent to an end portion of the internal thread portion on the front side in the screwing direction of the external thread member into the internal thread portion, and a thread groove And a cylindrical portion formed at a uniform height without providing the.
一般的な雌ねじ部材に雄ねじ部材をねじ込む前の状態を示した斜視図である。It is the perspective view which showed the state before screwing a male screw member in a common female screw member. 図１Ａに示した雌ねじ部材およびその近傍のＡ－Ａ’線に沿った断面図である。FIG. 1B is a cross-sectional view taken along line A-A ′ in the vicinity of the female screw member shown in FIG. 1A. 本発明の一実施形態に係る雌ねじ部材に雄ねじ部材を挿入する前の状態を示した斜視図である。It is the perspective view which showed the state before inserting a male screw member in the female screw member which concerns on one Embodiment of this invention. 図２Ａに示した雌ねじ部材およびその近傍のＢ－Ｂ’線に沿った断面図である。FIG. 2B is a cross-sectional view taken along line B-B ′ in the vicinity of the female screw member shown in FIG. 2A. 図２Ａに示した雌ねじ部材およびその近傍のＢ－Ｂ’線に沿った断面図である。FIG. 2B is a cross-sectional view taken along line B-B ′ in the vicinity of the female screw member shown in FIG. 2A. 図２Ａに示した雌ねじ部材を拡大して示したＢ－Ｂ’線に沿った断面図である。FIG. 2B is a cross-sectional view taken along line B-B ′ in which the female screw member shown in FIG. 2A is enlarged. 図２Ａに示した雌ねじ部材の円筒部に雄ねじ部材の雄ねじ部を挿入した後の状態を示した斜視図である。It is the perspective view which showed the state after inserting the external thread part of an external thread member in the cylindrical part of the internal thread member shown to FIG. 2A. 図４Ａに示した雌ねじ部材およびその近傍のＣ－Ｃ’線に沿った断面図である。FIG. 4B is a cross-sectional view taken along the line C-C ′ in the vicinity of the female screw member shown in FIG. 4A.
　次に、本発明の実施形態について図面を参照して説明する。 Next, an embodiment of the present invention will be described with reference to the drawings.
　図２Ａは本発明の一実施形態に係る雌ねじ部材に雄ねじ部材を挿入する前の状態を示した斜視図であり、図２Ｂは図２ＡのＢ－Ｂ’線に沿った断面図である。 FIG. 2A is a perspective view showing a state before the male screw member is inserted into the female screw member according to the embodiment of the present invention, and FIG. 2B is a cross-sectional view taken along line B-B ′ of FIG. 2A.
　本実施形態に係る雌ねじ部材１４は、樹脂成形品や板金に一般的な雄ねじ部材をねじ込む必要がある場合などに使用可能なインサートナットである。雌ねじ部材１４は、外部部材に固定されるために外周面から突出して設けられた固定部１４ｄを有している。雌ねじ部材１４は、本実施形態では、プラスチックで形成された外部部材である筐体１の円筒状のボス形状部１ａ内に熱圧入などの手法により取り付けられている。 The female screw member 14 according to the present embodiment is an insert nut that can be used when it is necessary to screw a general male screw member into a resin molded product or a sheet metal. The female screw member 14 has a fixing portion 14d provided so as to protrude from the outer peripheral surface in order to be fixed to the external member. In this embodiment, the female screw member 14 is attached to the cylindrical boss-shaped portion 1a of the casing 1 which is an external member made of plastic by a technique such as hot press fitting.
　雌ねじ部材１４には、雄ねじ形状について規格化されている雄ねじ部材２の雄ねじ部２ａを中心軸ｂ方向にねじ込み可能な雌ねじ部１４ａが設けられている。なお、本実施形態では、規格化された雄ねじ部材の一例として雄ねじ部材２を用いて説明するが、雌ねじ部材１４の雌ねじ部１４ａは、使用する雄ねじ部材の雄ねじ形状に応じて様々な形状に変更して形成されるため、様々な雄ねじ部材に対応可能である。 The female screw member 14 is provided with a female screw portion 14a capable of screwing the male screw portion 2a of the male screw member 2 standardized with respect to the male screw shape in the direction of the central axis b. In this embodiment, the male screw member 2 will be described as an example of a standardized male screw member. However, the female screw portion 14a of the female screw member 14 is changed to various shapes according to the male screw shape of the male screw member to be used. Therefore, it can be applied to various male screw members.
　雄ねじ部材２としては、たとえば、国際標準化機構（ＩＳＯ：Ｉｎｔｅｒｎａｔｉｏｎａｌ　Ｏｒｇａｎｉｚａｔｉｏｎ　ｆｏｒ　Ｓｔａｎｄａｒｄｉｚａｔｉｏｎ）、日本工業規格（ＪＩＳ：Ｊａｐａｎｅｓｅ　Ｉｎｄｕｓｔｒｉａｌ　Ｓｔａｎｄａｒｄｓ）、米国規格協会（ＡＮＳＩ：Ａｍｅｒｉｃａｎ　Ｎａｔｉｏｎａｌ　Ｓｔａｎｄａｒｄｓ　Ｉｎｓｔｉｔｕｔｅ）によって規格化されたものを用いることができる。 As the male screw member 2, for example, International Organization for Standardization (ISO), Japanese Industrial Standards (JIS), Standard Standard by American National Standards) is used by American Standards (ANSI). be able to.
　図３は、図２Ａに示した雌ねじ部材１４を拡大して示したＢ－Ｂ’線に沿った断面図である。雌ねじ部１４ａの、雄ねじ部２ａの雌ねじ部１４ａへのねじ込み方向手前側の端部は、雌ねじ部１４ａの中心軸ｂに実質的に垂直な面に沿って形成されている。雌ねじ部材１４には、雌ねじ部１４ａと同心で、雄ねじ部２ａのねじ込み方向手前側の雌ねじ部１４ａの端部に隣接し、ねじ溝を設けずに均一な高さＴに形成された円筒部１４ｂが設けられている。 FIG. 3 is a cross-sectional view taken along the line B-B ′ showing the female screw member 14 shown in FIG. 2A in an enlarged manner. The end portion of the female screw portion 14a on the front side in the screwing direction of the male screw portion 2a into the female screw portion 14a is formed along a surface substantially perpendicular to the central axis b of the female screw portion 14a. The female screw member 14 is concentric with the female screw portion 14a, is adjacent to the end of the female screw portion 14a on the front side of the male screw portion 2a in the screwing direction, and has a cylindrical portion 14b formed at a uniform height T without providing a screw groove. Is provided.
　円筒部１４ｂは、中心軸ｂ方向全体にわたって雌ねじ部１４ａの谷径ｎと実質的に同一の内径ｍを有している。円筒部１４ｂの内径ｍは、雌ねじ部１４ａの谷径ｎと完全に同一である必要はなく、たとえば、円筒部１４ｂは、雌ねじ部１４ａの谷径ｎより０．１ｍｍ大きい内径ｍを有していてもよい。 The cylindrical portion 14b has an inner diameter m substantially the same as the valley diameter n of the female screw portion 14a over the entire direction of the central axis b. The inner diameter m of the cylindrical portion 14b is not necessarily the same as the valley diameter n of the female screw portion 14a. For example, the cylindrical portion 14b has an inner diameter m that is 0.1 mm larger than the valley diameter n of the female screw portion 14a. May be.
　また、円筒部１４ｂは、中心軸ｂ方向の長さである高さＴが、雌ねじ部１４ａの互いに隣り合うねじ山の頂部の間隔である雌ねじ部１４ａのピッチＰの２倍を超え、かつ５倍以下になるように形成されている。円筒部１４ｂの高さＴは、内面の全周にわたって実質的に同一である。 Further, the cylindrical portion 14b has a height T, which is the length in the direction of the central axis b, exceeding twice the pitch P of the female screw portion 14a, which is the interval between the tops of the adjacent screw threads of the female screw portion 14a, and 5 It is formed to be less than double. The height T of the cylindrical portion 14b is substantially the same over the entire circumference of the inner surface.
　さらに、雌ねじ部材１４には、円筒部１４ｂに対して雄ねじ部２ａの雌ねじ部１４ａへのねじ込み方向手前側に隣接している傾斜部１４ｃが設けられている。傾斜部１４ｃの内面は、円筒部１４ｂの内面に連続して、円筒部１４ｂから離れるにつれて内径が大きくなるように形成されている。傾斜部１４ｃは、たとえば、円筒部１４ｂを傾斜部１４ｃの中心軸ｂ方向の高さの分だけ長く形成しておき、円筒部１４ｂのねじ込み方向手前側の端部の内面を面取りすることにより形成する。 Furthermore, the female screw member 14 is provided with an inclined portion 14c adjacent to the cylindrical portion 14b on the front side in the screwing direction of the male screw portion 2a into the female screw portion 14a. The inner surface of the inclined portion 14c is formed to be continuous with the inner surface of the cylindrical portion 14b so that the inner diameter increases as the distance from the cylindrical portion 14b increases. The inclined portion 14c is formed by, for example, forming the cylindrical portion 14b longer by the height in the direction of the central axis b of the inclined portion 14c and chamfering the inner surface of the end portion of the cylindrical portion 14b on the front side in the screwing direction. To do.
　雌ねじ部材１４の雌ねじ部１４ａには、雄ねじ部材２の雄ねじ部２ａが、まず雌ねじ部材１４の円筒部１４ｂに挿入された後にねじ込まれる。雄ねじ部材２の雄ねじ部２ａは、ドライバの着磁された十字ビット３にヘッド２ｂの十字穴が係合されて磁力により仮固定された状態で、円筒部１４ｂに挿入される。雄ねじ部２ａが円筒部１４ｂに挿入される際、図２Ｃに示すように雄ねじ部２ａの中心軸ａが雌ねじ部１４ａの中心軸ｂに対して傾いている場合にも、雄ねじ部２ａは傾斜部１４ｃによって円筒部１４ｂ内にスムーズに導かれる。 The male screw portion 2 a of the male screw member 2 is first screwed into the female screw portion 14 a of the female screw member 14 after being inserted into the cylindrical portion 14 b of the female screw member 14. The male screw portion 2a of the male screw member 2 is inserted into the cylindrical portion 14b in a state where the cross hole of the head 2b is engaged with the cross bit 3 magnetized by the driver and temporarily fixed by a magnetic force. When the male screw portion 2a is inserted into the cylindrical portion 14b, as shown in FIG. 2C, even when the central axis a of the male screw portion 2a is inclined with respect to the central axis b of the female screw portion 14a, the male screw portion 2a is inclined. 14c smoothly guides into the cylindrical portion 14b.
　図４Ａは雌ねじ部材１４の円筒部１４ｂに雄ねじ部材２を挿入した後の状態を示した斜視図であり、図４Ｂは図４ＡのＣ－Ｃ’線に沿った断面図である。 4A is a perspective view showing a state after the male screw member 2 is inserted into the cylindrical portion 14b of the female screw member 14, and FIG. 4B is a cross-sectional view taken along the line C-C 'of FIG. 4A.
　円筒部１４ｂの内径ｍは、雄ねじ部材２の雄ねじ部２ａのねじ山と噛み合う雌ねじ部１４ａの谷径ｎと実質的に同一である。そのため、雄ねじ部２ａは、雌ねじ部１４ａのねじ溝と噛み合うねじ山の外周が、その全周にわたって、円筒部１４ｂの内面との間にほぼ隙間が無い状態で円筒部１４ｂ内に収容されている。 The inner diameter m of the cylindrical portion 14b is substantially the same as the valley diameter n of the female screw portion 14a that meshes with the screw thread of the male screw portion 2a of the male screw member 2. Therefore, the external thread portion 2a is accommodated in the cylindrical portion 14b with the outer periphery of the screw thread meshing with the thread groove of the female screw portion 14a being substantially free from the inner surface of the cylindrical portion 14b over the entire periphery. .
　すなわち、円筒部１４ｂに雄ねじ部２ａが挿入された際に、雄ねじ部２ａの中心軸ａ方向に形成された雄ねじ部２ａのねじ山の外周が、雌ねじ部の中心軸ｂに平行な円筒部１４ｂの内面に沿うように揃えられる。これにより、雄ねじ部２ａの中心軸ａと雌ねじ部１４ａの中心軸ｂとが一致させられる。 That is, when the male screw portion 2a is inserted into the cylindrical portion 14b, the outer periphery of the thread of the male screw portion 2a formed in the direction of the central axis a of the male screw portion 2a is parallel to the central axis b of the female screw portion 14b. It is aligned along the inner surface. Thereby, the central axis a of the external thread part 2a and the central axis b of the internal thread part 14a are made to correspond.
　また、雌ねじ部材１４の円筒部１４ｂ側の端部は、中心軸ｂに実質的に垂直な面に沿って形成されているため、円筒部１４ｂに雄ねじ部２ａが挿入された際に、雄ねじ部２ａの先端の外縁部に当接して雄ねじ部材２の位置を規制する。 Further, since the end portion of the female screw member 14 on the cylindrical portion 14b side is formed along a surface substantially perpendicular to the central axis b, when the male screw portion 2a is inserted into the cylindrical portion 14b, the male screw portion The position of the male screw member 2 is regulated by coming into contact with the outer edge of the tip of 2a.
　雄ねじ部２ａを円筒部１４ｂに挿入した後に、雄ねじ部材２をドライバの十字ビット３とともに中心軸ａを中心に回転させる。雄ねじ部２ａの中心軸ａと雌ねじ部１４ａの中心軸ｂとは一致しているため、雄ねじ部材２を中心軸ａを中心に回転させると雄ねじ部２ａと雌ねじ部１４ａとが正常に噛み合う。したがって、雄ねじ部２ａを雌ねじ部１４ａに中心軸ｂ方向に正常にねじ込むことができる。 After inserting the male screw portion 2a into the cylindrical portion 14b, the male screw member 2 is rotated around the central axis a together with the cross bit 3 of the driver. Since the central axis a of the male screw portion 2a and the central axis b of the female screw portion 14a coincide with each other, when the male screw member 2 is rotated around the central axis a, the male screw portion 2a and the female screw portion 14a are normally engaged with each other. Accordingly, the male screw portion 2a can be normally screwed into the female screw portion 14a in the direction of the central axis b.
　なお、実際には被固定部材が雄ねじ部材２のヘッド２ｂと雌ねじ部材１４との間に挟まれて固定される。しかし、本願の図面においては、被固定部材を省略して示している。 In practice, the fixed member is sandwiched and fixed between the head 2b of the male screw member 2 and the female screw member 14. However, in the drawings of the present application, the fixed member is omitted.
　また、雄ねじ部２ａが円筒部１４ｂに挿入されたとき、雄ねじ部２ａのねじ山の外周と円筒部１４ｂの内面との間にはわずかな隙間があり、その影響によって、雄ねじ部２ａの中心軸ａが雌ねじ部１４ａの中心軸ｂに対してわずかに傾くことがある。しかし、円筒部１４ｂの高さＴを、雌ねじ部１４ａのピッチＰの２倍を超えるように形成することにより、雄ねじ部２ａのねじ山の外周と円筒部１４ｂの内面との間のわずかな隙間の影響を受けずに、雄ねじ部２ａと雌ねじ部１４ａとを正常に噛み合わせることができる。 Further, when the male screw portion 2a is inserted into the cylindrical portion 14b, there is a slight gap between the outer periphery of the thread of the male screw portion 2a and the inner surface of the cylindrical portion 14b. a may be slightly inclined with respect to the central axis b of the female screw portion 14a. However, by forming the height T of the cylindrical portion 14b to exceed twice the pitch P of the female screw portion 14a, a slight gap between the outer periphery of the thread of the male screw portion 2a and the inner surface of the cylindrical portion 14b. The male screw portion 2a and the female screw portion 14a can be normally engaged with each other without being affected by the above.
　また、雄ねじ部２ａのねじ山の外周と円筒部１４ｂの内面との間のわずかな隙間の影響をより抑制するためには、雌ねじ部材１４の円筒部１４ｂの高さＴをより長くすることが望ましい。しかし、円筒部１４ｂの高さＴを長くするほど、雄ねじ部材２の雄ねじ部２ａのうち、雌ねじ部材１４の雌ねじ部１４ａに噛み合う部分の長さが短くなる。これにより、雄ねじ部材２の被固定物を雌ねじ部材１４に固定する力は弱くなる。 Further, in order to further suppress the influence of a slight gap between the outer periphery of the thread of the male screw portion 2a and the inner surface of the cylindrical portion 14b, the height T of the cylindrical portion 14b of the female screw member 14 is made longer. desirable. However, the longer the height T of the cylindrical portion 14b, the shorter the portion of the male screw portion 2a of the male screw member 2 that meshes with the female screw portion 14a of the female screw member 14. Thereby, the force which fixes the to-be-fixed thing of the external thread member 2 to the internal thread member 14 becomes weak.
　しかし、円筒部１４ｂの高さＴを、雌ねじ部１４ａのピッチＰの５倍以下にすることにより、雄ねじ部材２の被固定物を雌ねじ部材１４に固定するための十分な力を得ることができる。 However, by setting the height T of the cylindrical portion 14b to 5 times or less the pitch P of the female screw portion 14a, a sufficient force for fixing the fixed object of the male screw member 2 to the female screw member 14 can be obtained. .
　以上の理由により、本実施形態に係る雌ねじ部材１４は、円筒部１４ｂの高さＴが雌ねじ部１４ａのピッチＰの２倍を超え、かつ５倍以下になるように形成されている。しかし、円筒部１４ｂの高さＴは、被固定物の種類などに応じて、雄ねじ部２ａのねじ山の外周と円筒部１４ｂの内面との間のわずかな隙間の影響を抑制でき、かつ、雄ねじ部材２の被固定物を雌ねじ部材１４に固定するための十分な力を得ることができる範囲内において適宜変更することが可能である。 For the above reasons, the female screw member 14 according to the present embodiment is formed such that the height T of the cylindrical portion 14b exceeds twice the pitch P of the female screw portion 14a and is five times or less. However, the height T of the cylindrical portion 14b can suppress the influence of a slight gap between the outer periphery of the thread of the male screw portion 2a and the inner surface of the cylindrical portion 14b according to the type of the object to be fixed, and It is possible to appropriately change within a range in which a sufficient force for fixing the fixed object of the male screw member 2 to the female screw member 14 can be obtained.

Claims (7)

  1. 　雄ねじ部材をねじ込み可能な雌ねじ部と、
    　前記雌ねじ部と同心で、前記雄ねじ部材の前記雌ねじ部へのねじ込み方向手前側の前記雌ねじ部の端部に隣接し、ねじ溝を設けずに均一な高さに形成された円筒部と、
    　を有する雌ねじ部材。     A female screw part into which the male screw member can be screwed,
    A cylindrical part concentric with the female screw part, adjacent to the end of the female screw part on the front side in the screwing direction of the male screw member into the female screw part, and formed at a uniform height without providing a screw groove;
    A female screw member.
  2. 　前記円筒部の内径は前記雌ねじ部の谷径と同一である、請求項１に記載の雌ねじ部材。 The internal thread member according to claim 1, wherein an inner diameter of the cylindrical portion is the same as a valley diameter of the internal thread portion.
  3. 　前記円筒部の前記高さが、前記雌ねじ部のピッチの２倍を超え、かつ５倍以下になるように形成されている、請求項１または２に記載の雌ねじ部材。 The female screw member according to claim 1 or 2, wherein the height of the cylindrical portion is formed so as to be more than twice and less than five times the pitch of the female screw portion.
  4. 　前記ねじ込み方向手前側の前記円筒部の端部に隣接し、内面が、前記円筒部の内面に連続して、前記円筒部から離れるにつれて径が大きくなるように形成された傾斜部を有する、請求項１から３のいずれか１項に記載の雌ねじ部材。 Adjacent to an end portion of the cylindrical portion on the near side in the screwing direction, the inner surface has an inclined portion that is continuous with the inner surface of the cylindrical portion and is formed so that the diameter increases as the distance from the cylindrical portion increases. Item 6. The internal thread member according to any one of Items 1 to 3.
  5. 　外部部材に固定されるための固定部が設けられている、請求項１から４のいずれか１項に記載の雌ねじ部材。 The female screw member according to any one of claims 1 to 4, wherein a fixing portion for fixing the external member is provided.
  6. 　前記雄ねじ部材は、雄ねじ形状について規格化されている、請求項１から５のいずれか１項に記載の雌ねじ部材。 The female screw member according to any one of claims 1 to 5, wherein the male screw member is standardized with respect to a male screw shape.
  7. 　前記雄ねじ部材は、ＩＳＯ、ＪＩＳおよびＡＮＳＩのうちの少なくとも１つによって規格化されている、請求項６に記載の雌ねじ部材。 The female screw member according to claim 6, wherein the male screw member is standardized by at least one of ISO, JIS, and ANSI.
PCT/JP2009/051311 2009-01-28 2009-01-28 Female screw member WO2010086962A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017165295A (en) * 2016-03-17 2017-09-21 日立オートモティブシステムズ株式会社 Attaching structure of attaching member and attaching structure of electronic control device
JP2018159459A (en) * 2017-03-23 2018-10-11 有限会社上久商店 Insert nut and screw receiving structure of member to be attached
WO2020171181A1 (en) * 2019-02-22 2020-08-27 イワタボルト株式会社 Nut

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JPS492958U (en) * 1972-04-18 1974-01-11
JPS60188217U (en) * 1983-07-01 1985-12-13 三菱電機株式会社 Nut with guide
JPH02107811U (en) * 1989-02-15 1990-08-28
JP2009002481A (en) * 2007-06-25 2009-01-08 Chugoku Electric Power Co Inc:The Nut

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JPS492958U (en) * 1972-04-18 1974-01-11
JPS60188217U (en) * 1983-07-01 1985-12-13 三菱電機株式会社 Nut with guide
JPH02107811U (en) * 1989-02-15 1990-08-28
JP2009002481A (en) * 2007-06-25 2009-01-08 Chugoku Electric Power Co Inc:The Nut

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017165295A (en) * 2016-03-17 2017-09-21 日立オートモティブシステムズ株式会社 Attaching structure of attaching member and attaching structure of electronic control device
JP2018159459A (en) * 2017-03-23 2018-10-11 有限会社上久商店 Insert nut and screw receiving structure of member to be attached
WO2020171181A1 (en) * 2019-02-22 2020-08-27 イワタボルト株式会社 Nut
JP2020133819A (en) * 2019-02-22 2020-08-31 イワタボルト株式会社 nut
CN113544391A (en) * 2019-02-22 2021-10-22 岩田螺丝株式会社 Nut
CN113544391B (en) * 2019-02-22 2023-08-25 岩田螺丝株式会社 nut
US11953046B2 (en) 2019-02-22 2024-04-09 Iwata Bolt Co., Ltd. Nut

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