GB2063411A - Blind Fastener - Google Patents
Blind Fastener Download PDFInfo
- Publication number
- GB2063411A GB2063411A GB7939483A GB7939483A GB2063411A GB 2063411 A GB2063411 A GB 2063411A GB 7939483 A GB7939483 A GB 7939483A GB 7939483 A GB7939483 A GB 7939483A GB 2063411 A GB2063411 A GB 2063411A
- Authority
- GB
- United Kingdom
- Prior art keywords
- barrel
- plug
- fastener
- wall
- fastener according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 6
- 239000004411 aluminium Substances 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 239000004677 Nylon Substances 0.000 claims 1
- 229920001778 nylon Polymers 0.000 claims 1
- 238000011084 recovery Methods 0.000 abstract description 2
- 229920003023 plastic Polymers 0.000 abstract 1
- 239000004033 plastic Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 7
- 229920002302 Nylon 6,6 Polymers 0.000 description 3
- 230000003252 repetitive effect Effects 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 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
- F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
- F16B19/04—Rivets; Spigots or the like fastened by riveting
- F16B19/08—Hollow rivets; Multi-part rivets
- F16B19/10—Hollow rivets; Multi-part rivets fastened by expanding mechanically
- F16B19/1027—Multi-part rivets
- F16B19/1036—Blind rivets
- F16B19/1081—Blind rivets fastened by a drive-pin
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Insertion Pins And Rivets (AREA)
Abstract
A blind fastener has a thin metal barrel 16 and a plastics plug 18. The plug is deformed when pushed into the barrel accommodated in a hole in a workpiece W, W1, and expands the barrel at the blind side by recovery from deformation. It also expands beyond the end of the barrel to further resist withdrawal. <IMAGE>
Description
SPECIFICATION
Blind Fasteners
This invention is concerned with a blind fastener comprising a tubular metal body with a head flange at one end of an annular barrel wall of uniform thickness over at least most if its length and a plug which can be forced into the body after the body has been introduced into a hole in a workpiece to cause the body to be expanded radially at its tail end and thereby prevent removal of the body from the hole.
Many kinds of fasteners are available for joining together two or more plates of a workpiece with aligned holes in them under circumstances where there is convenient access to only one side of the workpiece, each kind of fastener having its own particular advantages and disadvantages. The merit of the fastener of the present invention lies in its ability to seal the hole through the workpiece and provide a secure joint with a shear strength which is high for the relatively low installed cost of the fastener.
The advantages of the invention are thus achieved by providing that the plug is made of thermoplastic polymeric material of high compressive strength and high modulus of elasticity, the plug having a cylindrical portion of slightly larger diameter than the internal bore of said barrel wall so that said portion is deformed when it is forced through part of the barrel wall confined by the wall of the hold in the workpiece in which the body is being set, and the barrel wall of the body being thin enough to be expanded radially by the plug when unrestrained by the wall of said hole, recovery from deformation of a leading end portion of said cylindrical portion of the plug after passing through the part of the body so restrained serving to resist withdrawal of the plug.
The tubular metal body of a fastener in accordance with the invention preferably has an annular wall which is continuous (rather then one with a longitudinal slot in it) and may conveniently be provided by a conventional eyelet formed from aluminium or aluminium alloy sheet, in which case its barrel wall, while being of uniform thickness, may taper slightly towards the tail end where there is a small inwardly turned lip.
In such a case, the diameter of the plug will be slightly greater than the largest diameter of the barrel wall. The barrel wall preferably flares outwardly to provide a bell-mouth at the head flange end.
Preferably, the plug is of sufficiently reduced diameter for a short distance at one end for it to be tightly received in the head flange end of the body to provide an assemblage which can be handied as a unit until the plug is driven home.
Driving of the plug into the tubular body of the fastener after the barrel has been inserted in a hole in a workpiece can conveniently be effected by a series of blows from a power-operated repetitive hammering tool.
Where the barrel wall of a fastener in accordance with the invention is continuous and the metal body is non-ferrous or stainless steel, the fastener provides a good non-corrosive seal in plates of similar material The body may be anodized and coloured, and the plug material may also be distinctively coloured, so that the fastener can be used for decorative or other purposes where distinctive colouring is a desirable feature.
The plug material of a fastener in accordance with the invention is a thermoplastic polymeric material, of which nylon 66 is a suitable example.
Nylon 66 can be moulded to give individual plugs of compressive strength in the range of 45 to 1 15
MN/m2 and modulus of elasticity in the range of 1000 to 3000 MN/m2, such plugs being useful for bodies of soft aluminium. Other polymeric materials may, however, be used to provide plugs of similar strength and elasticity.
A fastener in accordance with the invention, selected to illustrate, the invention by way of example and not of limitation, is shown in the accompanying drawing, of which
Figure 1 is a view in longitudinal section showing the illustrative fastener with its body and plug in assembled relationship; and
Figure 2 shows the illustrative fastener after the body barrel has been inserted in a hole in the workpiece and the plug driven fully into it.
The illustrative fastener shown in Figure 1 comprises a tubular body 10 formed from soft aluminium sheet to provide a slightly tapering barrel 1 2 of uniform wall thickness and an inturned lip 14 at a tail end, and an outwardly directed head flange 1 6 and the other end. The fastener also comprises cylindrical plug 18 of uniform diameter except for a portion 20 of reduced diameter for a short distance at one end; an annular shoulder 22 separates the portion 20 from the larger diameter portion of the plug. The plug 1 8 is shown in Figure 1 assembled with the body 10 by having been pushed into it, reduced diameter portion 20 first, far enough for the body and plug to remain in such assembled relationship during handling of the fastener before setting.
In use, the illustrative fastener may be inserted, barrel first, into an aligned hole in a workpiece comprising, for example, two plates W, W', until the head flange 1 6 abuts the workpiece W at one side; the plug 1 8 is then pushed fully home into the body by repetitive blows by any suitable means, e.g. a hammer, until its exposed end lies flush with the head flange 1 6. When so pushed into the body, the plug material (of the larger diameter portion of the piug) expands the barrel of the body to fill the holes in the workpiece and then yields elastically to allow the plug to pass into that part of the barrel which is restrained from further expansion by the surrounding plates.
When the plug emerges from the remote side of the workpiece, the larger diameter portion of the plug recovers to an extent sufficient first to radially expand the projecting tail end portion of the barrel and then, on emerging from the barrel, to itself radially overlap the end of the barrel.
Thus, the barrel is set at its tail end by radial expansion beyond the wall of the hole in the plate
W', to secure the plates together, and the plug by its overlapping the tail end of the barrel is restrained from withdrawal. At the same time, the exposed end of the plug has been driven flush with the head flange 14, an uncompressed end portion of the plug being accommodated in the n,outh of the flange and restraining the plug from being pushed further through the body.
The metal body of the illustrative fastener is a conventional eyelet formed from 0.018 inch (0.46 mm) thick soft aluminium sheet, the maximum external diameter under the head flange of the eyelet being 0.263 inch (6.68 mm) and the minimum at the tail end being 0.255 inch (6.48
mm). The head flange is 0.450 inch (11.4 mm) diameter and the overall length 0.290 inch (7.35
mm), the barrel below the head flange being
0.260 inch (6.6 mm) long. The nylon 66 plug has
a diameter of 0.249 inch (6.13 mm) reduced to
0.225 inch (5.77 mm) for an axial distance of
0.100 inch (2.54 mm) at one end, the overall
length of the plug being 0.440 inch (11.2 mm).
The compressive strength of the plug is 48.4- 110.5 MN/m2 and the modulus of elasticity 1790-2760 MN/m2.
Claims (7)
1. A blind fastener comprising a tubular metal body with a head flange at one end of an annular barrel wall of uniform thickness over at least most of its length and a plug which can be forced into the body after the body has been introduced into a hole in a workpiece to cause the body to be expanded radially at its tail end and thereby prevent removal of the body from the hole.
2. A fastener according to Claim 1 in which the wall of the barrel of the body reduces in diameter at its tail end without increasing in thickness.
3. A fastener according to Claim 1 or 2 in which the wall of the barrel of the body is a continuous annulus.
4. A fastener according to any one of the preceding claims in which the wall of the barrel flares outwardly to provide a bell-mouth at the head flange end.
5. A fastener according to any one of the preceding claims in which the plug has a reduced diameter portion at one end, which is received in the barrel of the body.
6. A fastener according to any one of the claims, the body of which is aluminium and the plug nylon.
7. A blind fastener substantially as hereinbefore described with reference to the accompanying drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7939483A GB2063411A (en) | 1979-11-14 | 1979-11-14 | Blind Fastener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7939483A GB2063411A (en) | 1979-11-14 | 1979-11-14 | Blind Fastener |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2063411A true GB2063411A (en) | 1981-06-03 |
Family
ID=10509199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7939483A Withdrawn GB2063411A (en) | 1979-11-14 | 1979-11-14 | Blind Fastener |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2063411A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012010858A1 (en) * | 2010-07-22 | 2012-01-26 | Avdel Uk Limited | Externally splined fastener |
| CN103534494A (en) * | 2011-05-11 | 2014-01-22 | 盈锋知识产权私人有限公司 | Splined fastener |
| CN105964805A (en) * | 2016-06-28 | 2016-09-28 | 芜湖通和汽车管路系统股份有限公司 | Pipeline structure riveting mold |
-
1979
- 1979-11-14 GB GB7939483A patent/GB2063411A/en not_active Withdrawn
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9447807B2 (en) | 2010-07-22 | 2016-09-20 | Avdel Uk Limited | Externally splined fastener |
| JP2013535626A (en) * | 2010-07-22 | 2013-09-12 | アブデル ユーケー リミテッド | Fasteners with splines on the outside |
| KR20130108982A (en) * | 2010-07-22 | 2013-10-07 | 아브델 유케이 리미티드 | Externally splined fastener |
| WO2012010858A1 (en) * | 2010-07-22 | 2012-01-26 | Avdel Uk Limited | Externally splined fastener |
| TWI447307B (en) * | 2010-07-22 | 2014-08-01 | Avdel Uk Ltd | Externally splined fastener |
| KR101965453B1 (en) | 2010-07-22 | 2019-04-03 | 아브델 유케이 리미티드 | Externally splined fastener |
| CN105351318A (en) * | 2010-07-22 | 2016-02-24 | 阿弗德尔英国有限公司 | Externally splined fastener |
| CN105351318B (en) * | 2010-07-22 | 2017-12-08 | 阿弗德尔英国有限公司 | There is the fastener of spline outside |
| CN103534494A (en) * | 2011-05-11 | 2014-01-22 | 盈锋知识产权私人有限公司 | Splined fastener |
| TWI572785B (en) * | 2011-05-11 | 2017-03-01 | 英費斯鐵克新加坡私人有限公司 | Splined fastener |
| CN103534494B (en) * | 2011-05-11 | 2016-08-17 | 盈锋知识产权私人有限公司 | Securing member with spline and installation method thereof, and there is the clamp device of this securing member |
| US9217454B2 (en) | 2011-05-11 | 2015-12-22 | Infastech Intellectual Properties Pte. Ltd. | Splined fastener |
| CN105964805A (en) * | 2016-06-28 | 2016-09-28 | 芜湖通和汽车管路系统股份有限公司 | Pipeline structure riveting mold |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |