WO2021065024A1 - Structure de fixation à vis - Google Patents

Structure de fixation à vis Download PDF

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Publication number
WO2021065024A1
WO2021065024A1 PCT/JP2019/051375 JP2019051375W WO2021065024A1 WO 2021065024 A1 WO2021065024 A1 WO 2021065024A1 JP 2019051375 W JP2019051375 W JP 2019051375W WO 2021065024 A1 WO2021065024 A1 WO 2021065024A1
Authority
WO
WIPO (PCT)
Prior art keywords
screw
hole
fastened
diameter
fastening
Prior art date
Application number
PCT/JP2019/051375
Other languages
English (en)
Japanese (ja)
Inventor
慎悟 鳥居
啓一 宮田
Original Assignee
日東精工株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日東精工株式会社 filed Critical 日東精工株式会社
Publication of WO2021065024A1 publication Critical patent/WO2021065024A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread

Definitions

  • the present invention relates to a screw fastening structure for fastening a resin fastening member and a to be fastened member with screw parts.
  • a pilot hole is provided in the fastened body
  • a through hole also known as a wrong hole
  • the fastened body is laminated with the fastened body.
  • a method is known in which a screw shaft portion of a tappin screw is inserted through a through hole of a fastened body and screwed into a pilot hole of the fastened body to fix the fastened body to the fastened body.
  • tapping screw when the fastening body or the fastened body is a thermoplastic resin, it is deformed in a thermal environment, which causes rattling, which causes loosening of the screw.
  • the member fastening structure shown in Patent Document 1 is used as the screw fastening structure for preventing the screw from loosening due to rattling.
  • a metal insert nut 220 is inserted into the prepared hole 210 of the fastening body 200, and a metal collar 320 is inserted into the through hole 310 of the body to be fastened 300.
  • the insert nut 220 is screwed into the inner peripheral surface of the insert nut 220 while forming a female screw with the screw shaft portion 110 of the tapping screw 100. Therefore, the metal insert nut 220 and the collar 320 are less likely to be deformed than the thermoplastic resin in a thermal environment, so that loosening of the screw due to rattling can be prevented.
  • the present invention has been created in view of the above problems, and realizes weight reduction in the fastening structure of the fastening body and the fastened body made of a thermoplastic resin without causing loosening in a thermal environment. It is an object of the present invention to provide a screw fastening structure.
  • the above-mentioned problem is composed of a fastening body having a hole, a body to be fastened having a through hole, and a tapping screw having a head and a screw shaft portion, and the screw shaft portion of the tapping screw is fastened.
  • the screw fastening structure is characterized in that the fastened body is fixed to the fastened body by inserting it into the through hole of the fastened body and the through hole of the fastened body and screwing it into both the hole of the fastened body and the through hole of the fastened body. it can.
  • the screw shaft portion of the tapping screw has a small-diameter screw portion provided on one side in the axial direction and a large-diameter screw portion provided on the other side in the axial direction. It is preferable to screw the diameter screw portion into the through hole of the object to be fastened.
  • the inner diameter d1 of the hole of the fastener, the inner diameter d2 of the through hole of the object to be fastened, the outer diameter D1 of the small diameter screw portion of the screw shaft portion, and the outer diameter D2 of the large diameter screw portion of the screw shaft portion are large and small.
  • the relationship is preferably d1 ⁇ D1 ⁇ d2 ⁇ D2.
  • the total length of the small-diameter screw portion is larger than the thickness of the object to be fastened, and the total length of the large-diameter screw portion is smaller than the thickness of the body to be fastened.
  • the fastening structure of the present invention can prevent loosening and rattling in a thermal environment without using insert nuts and insert collars for the fastener and the object to be fastened made of thermoplastic resin. Further, since the insert nut and the insert collar are not required, the weight can be reduced.
  • reference numeral 1 denotes a screw fastening structure of the present invention, which is composed of a tapping screw 10, a fastening body 20, and a body to be fastened 30 fixed to the fastening body 20 by the tapping screw 10.
  • the tapping screw 10 is composed of a head portion 11 having a cross hole (not shown) into which a driver bit can be fitted, and a screw shaft portion 12 integrally molded with the head portion 11.
  • the cross-sectional shape of the screw shaft portion 12 excluding the screw thread is circular or substantially triangular.
  • the screw shaft portion 12 is composed of a small-diameter screw portion 13 provided on the tip side and a large-diameter screw portion 14 provided on the head side, and the screw outer diameter of the small-diameter screw portion 13 is D1 and large.
  • the outer diameter of the screw portion 14 is set to D2
  • the magnitude relationship between the dimensions of D1 and D2 is set so that D1 ⁇ D2.
  • the small-diameter screw portion 13 and the large-diameter screw portion 14 may be either a right-hand thread or a left-hand thread.
  • pitches of the small-diameter screw portion 13 and the large-diameter screw portion 14 are set to be the same.
  • the total length T1 of the small-diameter screw portion 13 of the screw shaft portion 12 is set to be larger than the total length T2 of the large-diameter screw portion 14.
  • Both the fastening body 20 and the fastening body 30 are made of a thermoplastic resin. Further, the fastening body 20 is provided with a bottomed hole 21 having an opening on the plane of the fastening body 20 as a pilot hole, and the bottomed hole 21 is a bag hole through which the bottom surface of the fastening body 20 does not penetrate. It has become.
  • the object to be fastened 30 is provided with a through hole 31 as a through hole that penetrates from the flat surface of the body to be fastened 30 to the bottom surface side. Stepped portions 21a and 31b are formed in the bottomed holes 21 and the through holes 31 at the openings on the flat surface side, respectively.
  • the fastened body 30 is laminated on the fastened body 20 so that the hole 21 of the fastened body 20 and the through hole 31 of the fastened body 30 communicate with each other.
  • the bottomed hole 21 of the fastening body 20 may be a through hole, that is, a hole.
  • the magnitude relationship between the dimensions of d1 and d2 is d1 ⁇ d2.
  • the inner diameter d1 of the bottomed hole 21 of the fastening body 20 is d1 and the inner diameter of the through hole 31 of the fastened body 30 is d2
  • the magnitude relationship between the dimensions of d1 and d2 is d1 ⁇ d2.
  • the inner diameter d1 of the bottomed hole 21 of the fastening body 20 the inner diameter d2 of the through hole 31 of the fastened body 30, the outer diameter D1 of the small diameter screw portion 13 of the screw shaft portion 2, and the large diameter of the screw shaft portion 2
  • the magnitude relationship between the screw portion 14 and the outer diameter D2 is d1 ⁇ D1 ⁇ d2 ⁇ D2.
  • the total length T1 of the small-diameter screw portion 13 is set to be larger than the thickness t2 of the object to be fastened 30, and the total length T2 of the large-diameter screw portion 14 is set to be smaller than the thickness t1 of the body to be fastened 20.
  • the screw shaft portion 12 of the tapping screw 10 is inserted into the through hole 31 of the fastened body 30.
  • the screw shaft portion 12 of the tapping screw 10 is inserted into the through hole 31 of the fastened body 30.
  • the bottomed hole 21 of the fastening body 20 is formed without touching the inner peripheral surface of the through hole 31. Will be inserted.
  • the small-diameter screw portion 13 is screwed while forming a female screw on the inner peripheral surface of the bottomed hole 21.
  • the large-diameter threaded portion 14 is inserted into the through hole 31 of the object to be fastened 30.
  • the large-diameter screw portion 14 forms a female screw on the inner peripheral surface of the through hole 31. Screwed in.
  • the tappin screw 10 is screwed into the fastening body 20 and the fastened body 30 until the seating surface of the head 11 is seated on the flat surface of the fastened body 30.
  • the boundary portion between the small diameter screw portion 13 and the large diameter screw portion 14 is located inside the through hole 31 of the object to be fastened 30.
  • the reason why the size relationship between the large-diameter screw portion 14 of the portion 2 and the outer diameter D2 is d1 ⁇ D1 ⁇ d2 ⁇ D2 is that the inner diameter d1 of the bottomed hole 21 and the inner diameter of the through hole 31 are assumed.
  • the small-diameter threaded portion 13 is screwed in while forming a female thread on the inner peripheral surface of the through hole 31, so that it takes more time than necessary for screwing. Further, in such a case, when the positional relationship between the fastening body 20 and the fastened body 30 is displaced to the left or right, the tapping screw 10 cannot be screwed in. In order to prevent such a problem, the size relationship of the above-mentioned dimensions is established.
  • the screw fastening structure 1 when the resin fastening body 20 and the fastening body 30 are contracted and deformed due to the influence of heat, the axial force is lost, but the screw shaft portion 12 is the fastening body. Since it is screwed into both the 20 and the object to be fastened 30, rattling does not occur, and a loosening prevention effect can be obtained by not causing rattling that causes loosening. Further, in this way, even if parts such as an insert collar and an insert nut are not used, the resin fastening body 20 and the fastened body 30 are effective in preventing loosening, which can contribute to weight reduction. it can.
  • Screw fastening structure 10 Tapping screw 11 Head 12 Screw shaft 13 Small diameter screw 14 Large diameter screw 20 Fastening body 21 Bottomed hole 30 Fastened body 31 Through hole

Abstract

Le problème décrit par la présente invention est de fournir une structure de fixation à vis destinée à empêcher, même dans un environnement chaud, le desserrage d'un corps de fixation ou d'un corps fixé qui sont formés d'une résine thermoplastique, la structure de fixation à vis permettant également une réduction du poids. La solution selon l'invention porte sur une structure de fixation à vis qui comprend : un corps de fixation (20) à l'intérieur duquel est percé un trou à fond (21) ; un corps fixé (30) à l'intérieur duquel est percé un trou traversant (31) ; et une vis taraudeuse (10) comprenant une partie tête (11) et une partie arbre de vis (12), la partie arbre de vis (12) de la vis taraudeuse (10) étant insérée à travers le trou à fond (21) dans le corps de fixation (20) et le trou traversant (31) dans le corps fixé (30) et étant vissé à la fois dans le trou à fond (21) et le trou traversant (31) de manière à attacher le corps fixé (30) au corps de fixation (20), dans lequel une longueur totale (T1) d'une partie vis de petit diamètre (13) est supérieure à une épaisseur (t2) du corps fixé, et une longueur totale (T2) d'une partie vis de grand diamètre (14) est inférieure à l'épaisseur (t2) du corps fixé.
PCT/JP2019/051375 2019-09-30 2019-12-27 Structure de fixation à vis WO2021065024A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-180565 2019-09-30
JP2019180565A JP2021055778A (ja) 2019-09-30 2019-09-30 ねじ締結構造

Publications (1)

Publication Number Publication Date
WO2021065024A1 true WO2021065024A1 (fr) 2021-04-08

Family

ID=75272451

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/051375 WO2021065024A1 (fr) 2019-09-30 2019-12-27 Structure de fixation à vis

Country Status (2)

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JP (1) JP2021055778A (fr)
WO (1) WO2021065024A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0719604U (ja) * 1993-09-13 1995-04-07 富士通株式会社 ねじ締結構造
JPH10311317A (ja) * 1997-05-09 1998-11-24 Sannohashi:Kk ２部材締結方法及びその方法に用いるボルト
JP2018112292A (ja) * 2017-01-13 2018-07-19 日東精工株式会社 締結構造
JP2019113111A (ja) * 2017-12-22 2019-07-11 日東精工株式会社 部材締結構造

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0719604U (ja) * 1993-09-13 1995-04-07 富士通株式会社 ねじ締結構造
JPH10311317A (ja) * 1997-05-09 1998-11-24 Sannohashi:Kk ２部材締結方法及びその方法に用いるボルト
JP2018112292A (ja) * 2017-01-13 2018-07-19 日東精工株式会社 締結構造
JP2019113111A (ja) * 2017-12-22 2019-07-11 日東精工株式会社 部材締結構造

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JP2021055778A (ja) 2021-04-08

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