WO2007134361A1 - Clearance hole cutting screw - Google Patents
Clearance hole cutting screw Download PDFInfo
- Publication number
- WO2007134361A1 WO2007134361A1 PCT/AU2007/000568 AU2007000568W WO2007134361A1 WO 2007134361 A1 WO2007134361 A1 WO 2007134361A1 AU 2007000568 W AU2007000568 W AU 2007000568W WO 2007134361 A1 WO2007134361 A1 WO 2007134361A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- screw
- shank
- sheet
- wing
- cutting
- Prior art date
Links
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000000758 substrate Substances 0.000 claims abstract description 5
- 238000005553 drilling Methods 0.000 claims description 13
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 5
- 239000011151 fibre-reinforced plastic Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 239000004417 polycarbonate Substances 0.000 description 5
- 229920000515 polycarbonate Polymers 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000005253 cladding Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/10—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D3/00—Roof covering by making use of flat or curved slabs or stiff sheets
- E04D3/36—Connecting; Fastening
- E04D3/3605—Connecting; Fastening of roof covering supported directly by the roof structure
- E04D3/3606—Connecting; Fastening of roof covering supported directly by the roof structure the fastening means being screws or nails
-
- 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
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/001—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
- F16B25/0031—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the screw being designed to be screwed into different materials, e.g. a layered structure or through metallic and wooden parts
-
- 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
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
- F16B25/0089—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw the screw having wings
-
- 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
- F16B5/0241—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 with the possibility for the connection to absorb deformation, e.g. thermal or vibrational
Definitions
- the present invention relates to a screw for fastening sheet material to a substrate and more particularly to a screw for fixing roof sheeting and wall cladding of polycarbonate, fibre reinforced plastics, other plastics materials and non-plastics materials having a relatively high coefficient of thermal expansion.
- Semi-rigid plastics sheeting such as polycarbonate sheeting or fibre-reinforced plastics sheeting as used in building construction such as for roofing and wall cladding has a significantly higher coefficient of thermal expansion than corresponding steel sheeting.
- underlying substrate such as battens or purlins of wood or metal by means of screws it is recommended that the shank of the screw passes through the sheet with a clearance sufficient to take up expansion and contraction of the sheet to avoid buckling and possible damage to the sheet by interference with the screw.
- the sheet can be pre-drilled with a clearance hole of sufficient diameter prior to application of the fastening screw, for speed of installation it is more desirable to use a self-drilling screw with an in-built facility to provide a clearance hole of sufficient diameter to accommodate the thermal movement of the sheet.
- a self-drilling screw with an in-built facility to provide a clearance hole of sufficient diameter to accommodate the thermal movement of the sheet.
- a screw for fastening semi-rigid sheet material to a substrate having a cutter arrangement integrally formed with the screw shank for cutting in the sheet a clearance hole relative to the screw shank so as to accommodate thermal movement between the sheet and the shank in use, the cutter arrangement comprising a plurality of wings spaced around the axis of the shank, each wing having a cutting edge extending generally in the longitudinal direction of the shank and directed forwardly in the direction of driving rotation of the screw.
- the screw is a self-drilling screw.
- the wings are formed in a part of the shank at the head end portion of the shank beyond the thread.
- Each wing is of substantially planar form and is so shaped that its cutting edge progressively diverges outwardly from the shank in a direction towards the head of the screw.
- the plane of the wing and thereby its cutting edge is inclined relative to the axis of the shank to produce a cutting action which tends not to cause flattening of the sheet during cutting.
- the inclination is within the range of approximately 2.5° to 20° to the axis of the shank.
- each wing includes at least one notch which extends through its cutting edge to receive the edge portion of the sheet around the hole being cut in circumstances where the cutter arrangement has pushed that edge portion away from the head of the screw during cutting.
- Figure 1 is a perspective view of a screw in accordance with the preferred embodiment of the invention.
- Figure 2 is an enlarged view showing a drilling portion of the screw
- Figure 3 is an enlarged view showing the array of cutting wings at the head end portion of the screw
- Figure 4 is a side view of the screw of Figure 1 but with the sealing washer absent;
- Figure 5 is a schematic enlarged view to show the inclination of a cutting wing
- Figure 6 is an enlarged fragmentary section on line D-D of Figure 4
- Figure 7 is a sectional view through a cutting wing to show its cutting edge in greater detail
- Figure 8 is a view of the screw during installation into sheeting
- Figure 9 is a view similar to Figure 8 but showing the screw when installed;
- Figure 10 is a fragmentary view showing a modified form of cutter arrangement;
- Figure 11 shows a detail of Figure 10.
- the screw as shown in the accompanying drawings is a self-drilling screw.
- the drilling portion 2 of the screw is of the form described in our patent no. 719725 and is suitable for fixing to timber or relatively thin metal battens.
- Other embodiments designed for fixing to metal purlins of approximately 1.5mm thickness or greater will have a fluted metal drilling portion of conventional form.
- the screw thread extends over the fluted zone of the drilling portion 2 whereas in an embodiment having the conventional metal drilling portion the screw thread commences adjacent the inner end of fluted section. It is to be understood that the invention is not restricted to the use of one or other of these forms of drilling portion and other drilling portions suited for the intended application could alternatively be used, for example a type 17 drilling portion.
- the thread extends part way along the shank of the screw and terminates short of the head.
- An array of cutting wings 4 is formed on the shank and lie adjacent the proximate end of the thread.
- the wings 4 serve to cut in the sheeting a clearance hole of larger diameter than that of the screw shank.
- the wings 4 are equally angularly spaced around the axis of the shank and in the form shown there are two such wings diametrically opposed although other arrangements are possible.
- Each wing is of substantially planar shape and advantageously its plane is inclined to the axis of the shank such that its outer end (its end adjacent to the thread) leads its inner end (its end closer to the head) in the direction of driving rotation of the screw. This is shown schematically in Figure 5.
- the inclination is within the range of approximately 2.5° to 20° with an inclination of approximately 8° being particularly preferred.
- the wing is also shaped to progressively increase in depth substantially from zero at its outer end to a maximum at its inner end.
- the wing is thereby provided with an outer edge which inclines radially outwardly in a direction towards the head of the screw and this edge is shaped to provide a sharp cutting edge 6 which extends forwardly in the direction of driving rotation of the screw.
- the cutting edge 6 is shown in the enlarged cross-sectional views of Figures 6 and 7. This form of cutting edge which is directed forwardly of the leading face of the wing provides a sharp, clean cut in the sheet as the screw is rotated. It is to be noted that this is in contrast to certain prior designs in which so-called cutting wings actually wear or rub a hole in the roofing sheet which can result in a ragged and uneven clearance hole which may not be of the recommended size to accommodate the range of thermal movement of the sheet.
- the rate at which the wings 4 cut into the sheeting is determined by the rate at which the screw is driven into the underlying batten or purlin and this is determined by the pitch of the thread.
- the rate of penetration of the screw needs to be controlled and this necessitates a relatively fine thread, typically a thread having at least 10 turns per inch (or the metric equivalent of that). In practice there will be between 10 and 20 turns per inch with approximately 14 turns per inch providing an acceptable balance between speed of installation of the screw and controlled rate of penetration of the wings during cutting.
- the wings are pressed out of the screw shank during manufacture of the screw and a screw thread of 14 gauge (or its metric equivalent) should provide sufficient material in the shank to permit forming of the wings.
- a screw thread of 14 gauge the shank would need to be of increased diameter in the portion beyond the thread to permit formation of the wings, and while this would be feasible, in practice it is not preferred as it would complicate manufacture somewhat.
- the particular design of the sharp cutting edge as illustrated in Figures 6 and 7 is also advantageous in terms of its manufacture as, by appropriate design of the press tooling, the cutting edge can be produced without producing flashing which requires subsequent removal.
- a sealing washer 10 of rubber-like material is installed on the unthreaded section of the shank between the cutting wings 4 and the head. Due to the divergent shape of the wings 4 the washer 10 is able easily to be assembled on the screw by pushing the washer 10 over the wings 4.
- the configuration of the screw with its sealing washer during installation and when installed is illustrated in Figures 8 and 9, respectively.
- the angular inclination of the wings, and thereby their cutting edges, relative to the axis of the shank makes the cutting action somewhat more gradual than would be the case if the wings were to be directed in alignment with the axis of the shank. In turn this reduces the tendency of the wings to flatten the sheet during cutting. Flattening of the sheet, or more accurately flattening of the corrugation or ridge through which the screw extends, will result in a width change of the overall sheet and this can lead to alignment problems when fixing the sheet.
- the screw also has utility not only with polycarbonate and fibre-reinforced plastics sheeting, but also other plastics sheeting and sheeting of material other than plastics and which features a high coefficient of thermal expansion and which requires a clearance hole to be produced, aluminium sheeting for example.
- Polycarbonate sheeting is somewhat softer and more flexible than fibre-reinforced plastics sheeting and in some circumstances there may be a tendency for the cutting edges 6 to push downwardly the peripheral edge portion of the hole being cut in the sheet which means that the hole might not be cut to the required diameter and also might not be a smooth circular cut.
- at least one notch 20 is formed in each cutting edge 6 and the adjacent part of the wing 4 as shown in Figures 10 and 11.
- the notch 20 is of such a depth as to accept the peripheral edge portion of the sheet around the hole deflected downwardly by the portion of the wings 4 beneath the notch so that when reaching the notch that deflected edge portion is able to flex into the notch.
- the upper or inner edge of the notch extends transversely to the axis of the screw whereby the peripheral edge portion of the cut sheet around the hole tends to be restrained within the notch during cutting by the part of the edge above the notch to produce a cleaner and rounder cut.
- the lower edge 20b of the notch is rather more obliquely inclined to the axis of the screw to facilitate entry of the edge portion of the cut sheet into the notch.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Connection Of Plates (AREA)
- Milling Processes (AREA)
- Details Of Cutting Devices (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NZ572315A NZ572315A (en) | 2006-05-19 | 2007-05-01 | Clearance hole cutting screw |
CN2007800174209A CN101443562B (en) | 2006-05-19 | 2007-05-01 | Clearance hole cutting screw |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2006902711 | 2006-05-19 | ||
AU2006902711A AU2006902711A0 (en) | 2006-05-19 | Screw |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007134361A1 true WO2007134361A1 (en) | 2007-11-29 |
Family
ID=38722838
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU2007/000568 WO2007134361A1 (en) | 2006-05-19 | 2007-05-01 | Clearance hole cutting screw |
Country Status (5)
Country | Link |
---|---|
CN (1) | CN101443562B (en) |
MY (1) | MY143094A (en) |
NZ (1) | NZ572315A (en) |
TW (1) | TWI342926B (en) |
WO (1) | WO2007134361A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2151590A1 (en) | 2008-08-06 | 2010-02-10 | Sunny Beam Industrial Co., Ltd | Winged fastener |
WO2012051643A1 (en) * | 2010-10-22 | 2012-04-26 | Ideal Fasteners Pty Ltd | Screw fastener |
AU2011200442B2 (en) * | 2011-02-03 | 2012-11-01 | Taiwan Shan Yin Int'l Co., Ltd. | A Roof Screw |
JP2014015966A (en) * | 2012-07-09 | 2014-01-30 | Pias Hanbai Kk | Screw for fastening roof material or outer wall material of three-layer structure |
CN104912892A (en) * | 2015-06-24 | 2015-09-16 | 贵州省华科实业有限公司 | Self-drilling screw with convenient replacement function after slipping |
CN104948556A (en) * | 2015-06-24 | 2015-09-30 | 贵州省华科实业有限公司 | Drill tail screw with good sealing performance and strong replaceability |
EP3276188A1 (en) * | 2016-07-28 | 2018-01-31 | Saint-Gobain Placo | Screw |
WO2018093872A1 (en) * | 2016-11-18 | 2018-05-24 | Phillips Screw Company | Fastener with cleaning and leveling wings |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102619842A (en) * | 2011-01-30 | 2012-08-01 | 庆达科技股份有限公司 | Roof screw |
CN110332196A (en) * | 2019-07-23 | 2019-10-15 | 湖南省合和顺信息技术咨询有限公司 | One kind is from the locking connection component of reaming waterproof |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3699841A (en) * | 1971-03-31 | 1972-10-24 | Illinois Tool Works | Drilling and reaming screw |
US3916757A (en) * | 1973-10-30 | 1975-11-04 | Illinois Tool Works | Fasteners |
DE2613720A1 (en) * | 1975-04-02 | 1976-10-14 | Deutsher Pty Ltd | DRILL AND THREAD FORMING SCREW |
DE9106268U1 (en) * | 1991-05-22 | 1991-09-12 | Mage S.A., Courtaman | Screw for fibre cement boards or materials with similar material properties |
FR2735191A1 (en) * | 1995-06-06 | 1996-12-13 | Patrick Thevenin | Self=piercing anchor screw for fixing roofing sheets to beams |
WO2002097214A1 (en) * | 2001-05-30 | 2002-12-05 | Loi & Tran Pty. Limited | Cutting screw |
JP2003013926A (en) * | 2001-07-02 | 2003-01-15 | Akihiko Ito | Fitting screw for corrugated plate made of polyvinyl chloride or polycarbonate |
AU2004200317A1 (en) * | 2004-01-28 | 2005-08-11 | M & W Fastener Co., Ltd | Screw including wings with serrated edges |
AU2006207873A1 (en) * | 2005-09-07 | 2007-03-22 | Loi & Tran Pty. Limited | Metal cutting screw |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE9106286U1 (en) * | 1991-05-22 | 1991-08-01 | Weisser GmbH, 7740 Triberg | Wooden rod pendulum for cuckoo clocks |
-
2007
- 2007-05-01 NZ NZ572315A patent/NZ572315A/en unknown
- 2007-05-01 CN CN2007800174209A patent/CN101443562B/en active Active
- 2007-05-01 WO PCT/AU2007/000568 patent/WO2007134361A1/en active Application Filing
- 2007-05-01 MY MYUI20084528 patent/MY143094A/en unknown
- 2007-05-16 TW TW96117478A patent/TWI342926B/en active
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3699841A (en) * | 1971-03-31 | 1972-10-24 | Illinois Tool Works | Drilling and reaming screw |
US3916757A (en) * | 1973-10-30 | 1975-11-04 | Illinois Tool Works | Fasteners |
DE2613720A1 (en) * | 1975-04-02 | 1976-10-14 | Deutsher Pty Ltd | DRILL AND THREAD FORMING SCREW |
DE9106268U1 (en) * | 1991-05-22 | 1991-09-12 | Mage S.A., Courtaman | Screw for fibre cement boards or materials with similar material properties |
FR2735191A1 (en) * | 1995-06-06 | 1996-12-13 | Patrick Thevenin | Self=piercing anchor screw for fixing roofing sheets to beams |
WO2002097214A1 (en) * | 2001-05-30 | 2002-12-05 | Loi & Tran Pty. Limited | Cutting screw |
JP2003013926A (en) * | 2001-07-02 | 2003-01-15 | Akihiko Ito | Fitting screw for corrugated plate made of polyvinyl chloride or polycarbonate |
AU2004200317A1 (en) * | 2004-01-28 | 2005-08-11 | M & W Fastener Co., Ltd | Screw including wings with serrated edges |
AU2006207873A1 (en) * | 2005-09-07 | 2007-03-22 | Loi & Tran Pty. Limited | Metal cutting screw |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2151590A1 (en) | 2008-08-06 | 2010-02-10 | Sunny Beam Industrial Co., Ltd | Winged fastener |
WO2012051643A1 (en) * | 2010-10-22 | 2012-04-26 | Ideal Fasteners Pty Ltd | Screw fastener |
AU2011318225B2 (en) * | 2010-10-22 | 2014-04-24 | Ideal Fasteners Pty Ltd | Screw fastener |
AU2011200442B2 (en) * | 2011-02-03 | 2012-11-01 | Taiwan Shan Yin Int'l Co., Ltd. | A Roof Screw |
JP2014015966A (en) * | 2012-07-09 | 2014-01-30 | Pias Hanbai Kk | Screw for fastening roof material or outer wall material of three-layer structure |
CN104912892A (en) * | 2015-06-24 | 2015-09-16 | 贵州省华科实业有限公司 | Self-drilling screw with convenient replacement function after slipping |
CN104948556A (en) * | 2015-06-24 | 2015-09-30 | 贵州省华科实业有限公司 | Drill tail screw with good sealing performance and strong replaceability |
EP3276188A1 (en) * | 2016-07-28 | 2018-01-31 | Saint-Gobain Placo | Screw |
WO2018019899A1 (en) * | 2016-07-28 | 2018-02-01 | Saint-Gobain Placo | Screw |
WO2018093872A1 (en) * | 2016-11-18 | 2018-05-24 | Phillips Screw Company | Fastener with cleaning and leveling wings |
CN110226048A (en) * | 2016-11-18 | 2019-09-10 | 菲利普螺丝公司 | With the fastener for cleaning and smoothing alar part |
TWI759356B (en) * | 2016-11-18 | 2022-04-01 | 美商飛利浦斯螺絲公司 | Fastener with cleaning and leveling wings |
Also Published As
Publication number | Publication date |
---|---|
MY143094A (en) | 2011-03-15 |
CN101443562B (en) | 2011-01-26 |
NZ572315A (en) | 2010-07-30 |
TWI342926B (en) | 2011-06-01 |
CN101443562A (en) | 2009-05-27 |
TW200801352A (en) | 2008-01-01 |
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