WO2010041437A1 - 螺子におけるドライバービット嵌合用十字溝の構造 - Google Patents
螺子におけるドライバービット嵌合用十字溝の構造 Download PDFInfo
- Publication number
- WO2010041437A1 WO2010041437A1 PCT/JP2009/005203 JP2009005203W WO2010041437A1 WO 2010041437 A1 WO2010041437 A1 WO 2010041437A1 JP 2009005203 W JP2009005203 W JP 2009005203W WO 2010041437 A1 WO2010041437 A1 WO 2010041437A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- groove
- cross
- screw
- end portion
- inner surfaces
- Prior art date
Links
- 238000005452 bending Methods 0.000 claims description 16
- 230000000669 biting effect Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
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
- F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
- F16B23/0007—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool
- F16B23/0023—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool substantially cross-shaped
-
- 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
- F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
- F16B23/0061—Specially shaped nuts or heads of bolts or screws for rotations by a tool with grooves, notches or splines on the external peripheral surface designed for tools engaging in radial direction
Definitions
- the present invention relates to a structure of a cross groove for screwdriver bit fitting in the screw when the screw is screwed by fitting a cross screw bit into a cross groove formed in the screw head.
- Patent Document 1 the inner surface pair of the first to fourth wing grooves excluding the tip portions forming the cross grooves are parallel to each other, the tip portions are inclined outward, and all of the first to fourth wing grooves are further formed. It proposes a cross groove structure with the inner surface vertical. JP 2000-230526 A
- the present invention provides a cross-groove structure for screwdriver bit fitting in a screw that can efficiently transmit the rotational force of the screwdriver bit to the screw while obtaining an effect of improving the biting with the driver bit.
- the cross groove for screwdriver bit fitting in the screw according to the present invention has the following configurations A to F.
- a head portion is provided at one end of the screw shaft portion, and a cross groove for screwdriver bit fitting is formed on the top surface of the head portion.
- the left and right inner surfaces of the first to fourth wing grooves of the cross groove are partitioned into a pair of proximal end inner surfaces, a pair of intermediate inner surfaces, and a pair of distal end inner surfaces.
- the base end portion inner surface is bent outward with respect to the base end portion inner surface of the adjacent wing groove, the intermediate portion inner surface is bent outward with respect to the base end portion inner surface, and the tip end inner surface is It is bent outward with respect to the inner side surface of the intermediate part.
- Each of the bending angles (inner angles) is set such that the bending angle of the inner surface of the base end portion ⁇ the bending angle of the inner surface of the intermediate portion ⁇ the bending angle of the inner surface of the distal end portion.
- the base end portion inner surface, the intermediate portion inner surface, and the tip end inner surface all have elevation angles that expand toward the opening surface of the cross groove.
- a configuration that is partitioned into three inner surfaces that is, the inner surface of the base end portion, the inner surface of the intermediate portion, and the inner surface of the tip portion, a configuration in which each inner surface is provided with a bending angle, and an elevation angle on each inner surface.
- the rotational force of the driver bit with respect to the screw can be transmitted efficiently, and in addition, a good biting effect can be obtained when the driver bit is fitted into the cross groove. It is possible to provide a screw having a cross groove for screwdriver bit fitting that can easily center and screw the screw.
- FIG. 1A is a cross-sectional view taken along line AA in FIG. 1
- B is a cross-sectional view taken along line BB
- C is a cross-sectional view taken along line CC
- D is a cross-sectional view taken along line DD.
- the longitudinal cross-sectional view of the cross groove which a driver bit fits.
- the longitudinal cross-sectional view which shows the state which the driver bit fitted in the said cross groove.
- the cross-sectional view along the screw head part top surface which shows the state which the driver bit fitted in the said cross groove, and its partial enlarged view.
- A is a cross-sectional view taken along the line AA in FIG. 5
- B is a cross-sectional view taken along the line BB
- C is a cross-sectional view taken along the line CC
- D is a cross-sectional view taken along the line DD.
- the screw 1 has a head portion 3 having a circular shape in plan view around the axis of the screw shaft 2 at one end of the screw shaft portion 2.
- a central hole 4 centered on the axis is formed at the center of the upper surface of the head portion 3, and first to fourth wing grooves 5, 6, 7, 8 are formed on the inner peripheral wall of the central hole 4 at intervals of 90 degrees. .
- the central hole 4 and the first to fourth wing grooves 5, 6, 7, and 8 converge gradually toward the lower end, gradually expand upward, and open at the top surface of the head portion 3.
- a conical hole 17 that terminates on the axis is provided at the lower end of the central hole 4, and the lower ends of the first to fourth wing grooves 5, 6, 7, 8 are terminated at the upper end of the conical hole 17.
- a cross groove 10 for fitting a triver bit 9 is formed by the central hole 4 and the first to fourth wing grooves 5, 6, 7, 8.
- the corresponding left and right inner side surfaces of the first to fourth wing grooves 5, 6, 7, and 8 are partitioned into a pair of base end portion inner side surfaces 11, a pair of intermediate portion inner side surfaces 12, and a pair of distal end portion inner side surfaces 13. .
- the base end portion inner side surface 11 bends outward ⁇ 1 with respect to the base end portion inner side surface 11 of the adjacent wing groove
- the intermediate portion inner side surface 12 bends outward ⁇ 2 with respect to the base end portion inner side surface 11, and the tip
- the inner part side surface 13 bends ⁇ 3 outward with respect to the intermediate part inner side surface 12.
- the above bending angles are set such that the bending angle ⁇ 1 of the proximal end inner surface 11 ⁇ the bending angle ⁇ 2 of the intermediate inner surface 12 ⁇ the bending angle ⁇ 3 of the distal inner surface 13.
- the bending angle ⁇ 1 is 140 degrees
- ⁇ 2 is 156 degrees
- ⁇ 3 is 164 degrees.
- a trapezoidal base end groove 14 that gradually expands toward the central hole 4 of the cross groove 10 is defined by the face of the base end inner surface 11, and an inverted trapezoid that gradually expands toward the front by the face of the tip inner surface 13.
- a front end groove 16 is defined, and a substantially parallel intermediate groove 15 is defined between the base end groove 14 and the front end groove 16 by the facing of the intermediate inner surface 12.
- the base end portion inner side surface 11, the intermediate portion inner side surface 12, and the tip end portion inner side surface 13 all have an elevation angle that expands toward the opening surface of the cross groove 10.
- FIG. 2A is a sectional view taken along line AA in FIG. 1
- FIG. 2B is a sectional view taken along line BB
- FIG. 2C is a sectional view taken along line CC
- FIG. 2D is a sectional view taken along line DD.
- the elevation angle ⁇ 4 with respect to the bottom surface of the wing groove of the base end portion inner surface 11 is 95 to 96 degrees
- the bottom surface of the intermediate portion inner surface 12 with respect to the bottom surface of the wing groove is set to 94 ° to 95 °
- the elevation angle ⁇ 6 with respect to the bottom surface of the wing groove of the inner end surface 13 is set to 92 ° to 93 °.
- each elevation angle is an obtuse angle and is set to have a relationship of ⁇ 4> ⁇ 5> ⁇ 6.
- the tip inner surface 13 is wide (corresponding to the length of the ridge line) at the edge on the ridge line side that is continuous with the intermediate inner surface 12, and is composed of an acute triangular plane that converges gradually toward the tip and terminates.
- a cross-sectional view taken along the line -C is a cross-sectional view of an intermediate portion of the inner side surface 13 of the tip, and a cross-sectional view taken along the line DD is a cross-sectional view near the tip.
- the intermediate inner surface 12 is slightly wide at the edge of the ridge line side connected to the proximal inner surface 11 (corresponding to the length of the ridge line).
- the proximal inner surface 11 communicates with the adjacent proximal inner surface 11. It is slightly wide at the end of the ridge line side to be provided (corresponding to the length of the ridge line), and each is composed of a plane of a substantially parallelogram.
- the height of each of the inner surfaces is set to the base end inner surface 11> intermediate inner surface 12> tip inner surface 13.
- the drawing shows the relative ratios of the heights of the respective inner side surfaces
- FIG. 4 is a longitudinal sectional view showing a state in which the driver bit 9 is fitted in the cross groove 10
- FIG. 5 is a cross-sectional view along the top surface of the head portion 3 showing the state in which the driver bit 9 is fitted in the cross groove 10.
- the driver bit 9 has first to fourth wing teeth 19, 20, 21, 22 protruding from the peripheral surface of the center portion 18 at 90 ° intervals in four directions, and the center hole 4 And the cruciform groove formed by the first to fourth wing grooves 5, 6, 7, and 8, and the wing teeth 19, 20, 21, and 22 are within the wing grooves 5, 6, 7, and 8.
- a proximal end outer surface 23 corresponding to the side surfaces 11, 12, and 13, an intermediate portion outer surface 24, and a distal end portion outer surface 25 are provided.
- the first to fourth wing teeth 19, 20, 21, and 22 are fitted into the first to fourth wing grooves 5, 6, 7, and 8 as shown in FIGS. 6A to 6D.
- FIG. 6A is a sectional view taken along line AA in FIG. 5
- FIG. 6B is a sectional view taken along line BB
- FIG. 6C is a sectional view taken along line CC
- FIG. 6D is a sectional view taken along line DD.
- Each cross-section indicating line is at the same position as that in FIG. 6C and 6D are cross-sectional views of the middle portion of the tip inner surface 13 and the vicinity of the tip, similar to FIGS. 2C and D.
- the inner side surface 13 and the outer side surface 25 of the distal end portion of the wing tooth are in close contact or substantially in close contact with each other.
- At least the proximal inner surface 11 of the wing groove and the proximal outer surface 23 of the wing tooth, and the intermediate inner surface 12 of the wing groove and the intermediate outer surface 24 of the wing tooth are in close contact or substantially in close contact with each other.
- the driver bit 9 When the driver bit 9 is rotated clockwise or counterclockwise, the wing teeth of the driver bit 9 are efficiently transmitted to the proximal inner surface 11, the intermediate inner surface 12, and the distal inner surface 13 of the wing groove. Reliable fastening by rotation is achieved. Therefore, the intended fastening purpose can be achieved without requiring the driver bit 9 to be pushed into the cross groove 10 deeply.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joining Of Building Structures In Genera (AREA)
- Earth Drilling (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
Description
Claims (1)
- 下記のA乃至Fの構成を有する螺子におけるドライバービット嵌合用十字溝の構造。
A:螺軸部の一端にヘッド部を有し、該ヘッド部の頭頂面にドライバービット嵌合用十字溝が形成されている。
B:上記十字溝の第一乃至第四ウイング溝の各左右内側面は一対の基端部内側面と一対の中間部内側面と一対の先端部内側面とに区画されている。
C:上記基端部内側面は隣接するウイング溝の上記基端部内側面に対し外側方へ屈曲し、上記中間部内側面は上記基端部内側面に対し外側方へ屈曲し、上記先端部内側面は上記中間部内側面に対し外側方へ屈曲している。
D:上記各屈曲角は基端部内側面の屈曲角<中間部内側面の屈曲角<先端部内側面の屈曲角の関係に設定されている。
E:上記基端部内側面の対面によって十字溝の中央穴へ向け漸次拡大する台形の基端部溝を画成し、上記先端部内側面の対面によって先方へ向け漸次拡大する逆台形の先端部溝を画成し、上記中間部内側面の対面によって上記基端部溝と先端部溝間に略平行な中間部溝を画成している。
F:上記基端部内側面と中間部内側面と先端部内側面とは何れも十字溝の開口面へ向け拡開する仰角を有している。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/122,419 US8757950B2 (en) | 2008-10-10 | 2009-10-07 | Structure of cross-shaped groove of screw for fit with driver bit |
CN200980139787.7A CN102177353B (zh) | 2008-10-10 | 2009-10-07 | 螺丝的螺丝刀嵌合用十字槽的结构 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008-264293 | 2008-10-10 | ||
JP2008264293A JP5021599B2 (ja) | 2008-10-10 | 2008-10-10 | 螺子におけるドライバービット嵌合用十字溝の構造 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010041437A1 true WO2010041437A1 (ja) | 2010-04-15 |
Family
ID=42100399
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2009/005203 WO2010041437A1 (ja) | 2008-10-10 | 2009-10-07 | 螺子におけるドライバービット嵌合用十字溝の構造 |
Country Status (4)
Country | Link |
---|---|
US (1) | US8757950B2 (ja) |
JP (1) | JP5021599B2 (ja) |
CN (1) | CN102177353B (ja) |
WO (1) | WO2010041437A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2476973A (en) * | 2010-01-18 | 2011-07-20 | Tite Range Developments Ltd | Drive recess |
US8757950B2 (en) | 2008-10-10 | 2014-06-24 | Crown Screw Corporation | Structure of cross-shaped groove of screw for fit with driver bit |
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DE102013105810A1 (de) | 2013-06-05 | 2014-12-11 | Ejot Gmbh & Co. Kg | Schraube mit einem einen Antrieb aufweisenden Schraubenkopf |
DE102013113401A1 (de) * | 2013-12-03 | 2015-06-03 | Adolf Würth GmbH & Co. KG | Schraube und Antriebselement mit Fase |
US11234899B2 (en) * | 2017-05-11 | 2022-02-01 | Scalpal Llc | Grasping facilitators and uses thereof and kits involving the same |
USD811868S1 (en) * | 2016-07-27 | 2018-03-06 | Katsuyuki Totsu | Screw |
US11969864B2 (en) * | 2017-05-11 | 2024-04-30 | Scalpal Llc | Multi-tier torque enhancer driver and/or receiver and method of using same |
AT520250B1 (de) * | 2017-08-14 | 2019-11-15 | Surgebright Gmbh | Knochenschraube |
JP1657097S (ja) * | 2019-07-25 | 2020-04-13 | ||
USD980707S1 (en) * | 2021-02-15 | 2023-03-14 | Min Woo Lee | Bolt |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8757950B2 (en) | 2008-10-10 | 2014-06-24 | Crown Screw Corporation | Structure of cross-shaped groove of screw for fit with driver bit |
GB2476973A (en) * | 2010-01-18 | 2011-07-20 | Tite Range Developments Ltd | Drive recess |
GB2476973B (en) * | 2010-01-18 | 2014-02-19 | Tite Range Developments Ltd | Drive recess |
Also Published As
Publication number | Publication date |
---|---|
US20110182696A1 (en) | 2011-07-28 |
US8757950B2 (en) | 2014-06-24 |
JP2010091087A (ja) | 2010-04-22 |
CN102177353B (zh) | 2013-03-06 |
CN102177353A (zh) | 2011-09-07 |
JP5021599B2 (ja) | 2012-09-12 |
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