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WO1996011311A1 - Element de fixation prealablement assemble - Google Patents

Element de fixation prealablement assemble Download PDF

Info

Publication number
WO1996011311A1
WO1996011311A1 PCT/EP1995/003942 EP9503942W WO9611311A1 WO 1996011311 A1 WO1996011311 A1 WO 1996011311A1 EP 9503942 W EP9503942 W EP 9503942W WO 9611311 A1 WO9611311 A1 WO 9611311A1
Authority
WO
WIPO (PCT)
Prior art keywords
screw
washer
fastening element
shaft
collar
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.)
Ceased
Application number
PCT/EP1995/003942
Other languages
English (en)
Inventor
Jeffrey L. Mossman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SFS Industrie Holding AG
Original Assignee
SFS Industrie Holding AG
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 SFS Industrie Holding AG filed Critical SFS Industrie Holding AG
Priority to AU38043/95A priority Critical patent/AU3804395A/en
Publication of WO1996011311A1 publication Critical patent/WO1996011311A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • E04D3/3601—Connecting; Fastening of roof covering supported by the roof structure with interposition of a insulating layer
    • E04D3/3603—Connecting; Fastening of roof covering supported by the roof structure with interposition of a insulating layer the fastening means being screws or nails
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D5/00—Roof covering by making use of flexible material, e.g. supplied in roll form
    • E04D5/14—Fastening means therefor
    • E04D5/144—Mechanical fastening means
    • E04D5/145—Discrete fastening means, e.g. discs or clips
    • 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
    • F16B43/00—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts

Definitions

  • the invention pertains to a fastening element including a screw and a large-surfaced metallic washer used to attach insulation material, and waterproofing membrane, onto a solid substructure.
  • the screw is provided with a drill tip, a shaft with a thread that extends over at least part of its length, and a screw head.
  • the washer is provided with a preferably central aperture in order to receive the screw shaft.
  • fasteners be preassembled, that is, with the washer attached to the screw. This facilitates rapid assembly, for example, installation of insulation layers on a roof top that has been prepared to receive the insulation. Because power tools are used in driving the screw into the substructure, it is most desirable at the start of installation that the washer of each fastener be at the same position on the screw in every instance. Then assembly becomes more routine and the time for assembly is more predictable.
  • the invention is generally used with an installation device to screw-in such a fastening element.
  • the device typically has a support surface for the washer as well as a receptacle tube to receive the end of the screw at which the screw head is located.
  • the receptacle tube is additionally constructed as a receptacle for an axially movable and rotatable tool to take hold of the screw head and to drive the screw into the substructure.
  • Fastening elements of the previously mentioned type are known in many different variations (for example, US Patent No. 4,781 ,503 and in pending U.S. application, S.N. 08/068,391 , filed May 28, 1993).
  • One of the purposes of these prior art fastening elements is to securely retain a large-surface washer against axial movement in the immediate area of the screw head or in a threadless shaft section located directly beneath the screw head. This positioning is intended to yield a certain degree of safety against loads, for example, people walking on the insulation sheeting, or on the waterproof sheeting applied on top of the insulation sheeting, during utilization of such fastening elements on roof surfaces. In other words, it is desirable that screw head penetration towards the outside through the waterproof sheeting be prevented, if such a walking load is applied.
  • a fastener element utilizes a plastic disk as the large-surface washer. plastic disk is braced against a peripheral collar arranged on the screw shaft.
  • a different vari of a fastener element utilizes a metallic washer, which is braced against the end of the thre section, provided adjacent to the screw head.
  • US Patent No. 4,809,568 introduced a fastening element and a device designed to screw-in fastening element.
  • This known fastening element comprised a screw and a plastic washer. washer had an extended hub in its central area proximate an aperture provided for insertio the screw shaft so that the wall of the aperture adjoins the screw threads over a relatively section. The fastener may be threaded into the washer and will remain in this positio preassembled condition until the final mounting process, because of the correspondingly s dimensions of the aperture in the washer.
  • An object of the invention is to provide an improved preassembled fastening element, including a screw and a metallic washer, that is optimally suitable for a special fastener.
  • Another object of the invention is to provide an improved preassembled fastening element that maintains a proper orientation of washer and screw after manufacture and during installation.
  • Yet another object of the invention is to provide an improved preassembled fastening element that is economical to produce.
  • Still another object of the invention is to provide an improved preassembled fastening element which maintains a selected fixed relative position between the screw and washer of the fastening element prior to installation of the fastening element.
  • a fastening element includes a large washer and a screw, which are preassembled so that the washer is at a right angle to the longitudinal axis of the screw, and the washer is fixedly attached to the screw at a preselected position in a mid-region of the screw.
  • the screw includes a conventional drill tip at its free end and a threaded shank, which may be fully threaded, or to decrease production cost is only partially threaded.
  • the other end of the screw terminates in a screw head which may be turned by a manual tool or a power tool, preferably in conjunction with a guiding and retaining fixture or attachment jig.
  • the jig assures the desired right angle entry of the screw into the substructure while the washer is maintained at a right angle to the screw shank.
  • the aperture in the washer has an axially extended collar that allows for a close sliding fit between the screw and the washer.
  • An adhesive material fixes the washer to the screw along the length of the collar and holds the preassembled condition after manufacture until installation at a construction site. However, for installation, turning forces, applied by a tool on the screw head, break the bond of the adhesive and permit the screw to move through the washer, preferably, while the screw head is retained in a guiding jig to maintain right angle orientation during the driving procedures.
  • the aperture in the collar is threaded and is small in diameter relative t screw thread height diameter such that the screw and washer are tightly joined together b engaged threads and an adhesive, and hold a fixed position until the screw is driven relati the washer by a tool.
  • the fastening element in accordance with the invention is not limited in its uses to ro constructions but may be used wherever a sheet material or sheeting, regardless of thick and rigidity or flexibility, must be attached to a supporting structure.
  • Fig. 1 is a front elevational view, in section, of a preassembled fastener in accordance with invention
  • Fig. 2 is a bottom view of the washer in the fastener of Fig. 1 ;
  • Fig. 3 is an elevational view, in section, of a fastener of Fig. 1 after installation to retai insulation panel on a substructure;
  • Fig. 4 is a fragmentary view similar to Fig. 1 , to an enlarged scale, of a first embodiment of invention.
  • Fig. 5 is a view similar to Fig. 4 of an alternative embodiment in accordance with the inventi
  • a preassembled fastening element 10 in accordance with invention includes a screw 12 connected to a washer 14.
  • the screw is in four portions include a drill tip 16 at one end, and a screw head 18 at the other end of the screw 10.
  • the illustr screw head 18 is hexagonal in cross section and would be turned with a plier-type or wrench or a socket wrench adapted to operate with the hex head. Note that any head including a means for power or hand driving is acceptable.
  • the screw also includes an unthreaded shank 20 adjacent to the screw head 18, and a threaded shank portion 22.
  • An integral washer 24 connected to the screw head 18 and to the unthreaded shank 20, provides for an aligned sliding fit of the screw in a fastening tool, for example, as in the above-referenced pending patent application.
  • the washer 14 is circular in shape and has a central aperture 26 wherethrough the screw 12 passes, as described more fully hereinafter, and is positioned in the preassembled condition.
  • the washer 14 lies generally in a plane that is perpendicular to the longitudinal axis 28 of the screw 12.
  • the washer 14 includes a central planar hub 30, a peripheral and coplanar rim 32, and a plurality of undulated ridges 34 positioned between the hub 30 and rim 32, concentrically with the aperture 26.
  • the ridges 34 provide rigidity in the washer 14, which is preferably made of metal although plastic is also suitable.
  • the undulating ridges 34 and their trough surfaces 36 provide an enlarged contact area with the insulation material and provide increased resistance to back-out of the fastening assembly 10 after installation.
  • the generally planar hub 30 connects to an axially extended collar 38 that includes internal threads 40 engaging external threads 42 on the screw 12.
  • An adhesive 46 fills the interstices between the threads.
  • the threads 40, 42 and adhesive 46 engage with a tight fit so that it is necessary that a substantial external force be applied to thread the washer 14 along the screw 12 to the preselected position, as illustrated in Fig. 1. That is, the connection between the screw 12 and the washer 14 is more than finger-tight; a driving tool or wrench may be required to preset the position of the washer 14 on the screw before the adhesive 46 is added.
  • the threads 42 on the screw 12 may be of the type that taps threads into a blank collar 38 upon initial assembly of the washer 14 onto the screw 12.
  • FIG. 5 illustrates an alternative embodiment of a fastening element in accordance with invention wherein the collar 38' is of larger diameter (compared to the embodiment of Fig. 4) unthreaded on its internal surface 44 such that the screw can slide through the collar 38' w close fit.
  • an adhesive 46 is applied to fill the collar.
  • the adhesive hardens and holds the wa and screw in fixed relative positions.
  • the holding strength of the adhesive is such that s mechanical advantage, either from a wrench or a power tool, is necessary to rotate the s relative to the washer. Finger force is insufficient.
  • the adhesive 46 serves to maintain preassembled condition of the fastener assembly, just as the interference threads 40, 42 adhesive serve the same function in the embodiment of Fig. 4.
  • the sleeve 38' in another alternative embodiment may have running threads (not shown) o inner surface to loosely engage the screw threads 42. However, fixed positioning on the scre achieved with the adhesive 46.
  • the screw 12 may have another unthreaded portion between unthreaded portion 20 and the drill tip 16.
  • This additional unthreaded portion in a preassem fastening element 10, may be located between the extreme edge 48 of the sleeve 38 and drill tip 16. Elimination of a portion of the threads on the screw reduces production c
  • sufficient length of threads must be maintained proximate the drill tip 16 as it is t initial threads 42 that engage the substructure and hold the entire fastening element 10 and insulation in place.
  • the unthreaded portion 20 is limited in length to restrict motion of the washer along the scre someone should walk on the washer after installation.
  • a corrugated substructure 52 is first attached to the roof. Then the insulation layer 50 is placed upon the substructure 52 and a fastening assembly 10 is connected for rotation to an installation tool.
  • the drill end 16 of the screw 12 is pressed into the insulation 50 until the washer 14 makes contact with the upper surface 54 of the insulation layer 50. Thereby, the washer is restrained from turning by friction, especially at the hub 30, rim 32 and low points 36 on the upper surface of the insulation layer.
  • the screw 12 As the screw 12 continues to be turned by the driving tool and the washer is restrained by friction from turning with the screw, the screw further penetrates the washer by breaking the adhesive bond and also overcoming the friction of the threads 40, 42.
  • the screw is advanced until the drill tip 16 engages and forms an opening 56 in the substructure 52. Rotation of the screw continues until the threads 42 on the screw 12 engage in the substructure and until the desired compression of the washer 14 into the upper surface 54 of the insulation layer 50 is achieved.
  • substantially the entire undersurface of the washer 14 is in frictional contact with a somewhat deformed upper surface 54 of the insulation layer 50.
  • a waterproof membrane (not shown) is provided over the insulation layer and generally covers the protruding screw head 18.
  • the collar 38 in its final installed position, is riding along the unthreaded portion 20 of the screw.
  • axial motion of the washer along the length of the screw is limited by the start of the threads 42.
  • the screw head is less able to pop out through the membrane when someone walks on the insulation layer, and the relative positions between the screw and the washer are maintained.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Bolts, Nuts, And Washers (AREA)

Abstract

Cet élément (10) de fixation comprend une grande rondelle (14) ainsi qu'une vis (12), lesquelles sont préalablement assemblées à angle droit. La rondelle (14) est attachée fixement à la vis (12) au niveau d'une position prédéterminée dans la région centrale de la vis (12). La vis (12) comprend un bout (16) perceur au niveau de son extrémité libre ainsi qu'une tige (22) filetée. L'autre extrémité de la vis (12) se termine par une tête (18) qui peut être tournée par un outil manuel ou un outil à moteur. L'ouverture (26) de la rondelle (14) présente un collier (38) s'étendant axialement et qui permet un ajustement par coulissement étroit entre la vis (12) et la rondelle (14), et un matériau adhésif fixe la rondelle (14) à la vis (12) sur la hauteur du collier (38) et maintient, après fabrication, l'état d'assemblage préalable dudit élément jusqu'au montage de celui-ci sur le site de construction. Pour réaliser ce montage, on applique à l'aide d'un outil, sur la tête (18) de la vis, des forces tournantes, lesquelles ont pour effet de briser la liaison réalisée par l'adhésif et de permettre à la vis (12) d'être déplacée à travers la rondelle (14). Dans un autre mode de réalisation, l'ouverture du collier est filetée. Ainsi, la vis et la rondelle sont jointes de façon serrée par leurs filetages mutuellement en contact ainsi que par un adhésif.
PCT/EP1995/003942 1994-10-07 1995-10-06 Element de fixation prealablement assemble Ceased WO1996011311A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU38043/95A AU3804395A (en) 1994-10-07 1995-10-06 Preassembled fastening element

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US32050994A 1994-10-07 1994-10-07
US08/320,509 1994-10-07

Publications (1)

Publication Number Publication Date
WO1996011311A1 true WO1996011311A1 (fr) 1996-04-18

Family

ID=23246751

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1995/003942 Ceased WO1996011311A1 (fr) 1994-10-07 1995-10-06 Element de fixation prealablement assemble

Country Status (2)

Country Link
AU (1) AU3804395A (fr)
WO (1) WO1996011311A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19640585A1 (de) * 1996-10-01 1998-04-09 Sfs Ind Holding Ag Befestigungselement zum Befestigen von Isolationsbahnen oder -platten und gegebenenfalls zusätzlichen Abdichtungsbahnen auf einem festen Unterbau sowie Verfahren zur Vormontage einer Unterlegscheibe an einem Schraubenschaft
EP1595040A4 (fr) * 2003-02-03 2009-11-04 Building Materials Invest Corp Plaque a double encoche comportant une attache
EP2354362A3 (fr) * 2010-01-13 2012-08-15 Heinrich Adriaans Dispositif de fixation pour l'ancrage d'éléments de construction sur un toit plat
US10190616B2 (en) 2016-01-04 2019-01-29 Celcore Incorporated Roof cover fastener
USD844424S1 (en) 2017-06-23 2019-04-02 Celcore Incorporated Roof cover fastener
US10253801B2 (en) 2015-09-29 2019-04-09 Simpson Strong-Tie Company Inc. Washer with shear tube
US12168992B2 (en) 2021-08-05 2024-12-17 The Hillman Group, Inc. Hardware assembly

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3212387A (en) * 1962-05-08 1965-10-19 California Plasteck Inc Plastic captive screw washer
GB1229922A (fr) * 1968-03-16 1971-04-28
GB1386003A (en) * 1968-03-16 1975-03-05 Firth Cleveland Fastenings Ltd Metal fastener assemblies
NL7415863A (en) * 1974-12-05 1976-06-09 Wilhelmus Everardus Korte Washer for screw fixing of fibrous material - has annular depressions concentric with bore and annular upward bulge around bore
US4793757A (en) * 1987-05-15 1988-12-27 Buell Industries, Inc. Finishing washer
US4809568A (en) * 1988-04-21 1989-03-07 Demby Industries, Inc. Barrel assembly for installation tool and method of installation
DE4239339A1 (de) * 1992-11-23 1994-05-26 Sfs Stadler Holding Ag Heerbru Befestigungselement sowie Vorrichtung zum Eindrehen eines Befestigungselementes

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3212387A (en) * 1962-05-08 1965-10-19 California Plasteck Inc Plastic captive screw washer
GB1229922A (fr) * 1968-03-16 1971-04-28
GB1386003A (en) * 1968-03-16 1975-03-05 Firth Cleveland Fastenings Ltd Metal fastener assemblies
NL7415863A (en) * 1974-12-05 1976-06-09 Wilhelmus Everardus Korte Washer for screw fixing of fibrous material - has annular depressions concentric with bore and annular upward bulge around bore
US4793757A (en) * 1987-05-15 1988-12-27 Buell Industries, Inc. Finishing washer
US4809568A (en) * 1988-04-21 1989-03-07 Demby Industries, Inc. Barrel assembly for installation tool and method of installation
DE4239339A1 (de) * 1992-11-23 1994-05-26 Sfs Stadler Holding Ag Heerbru Befestigungselement sowie Vorrichtung zum Eindrehen eines Befestigungselementes

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19640585A1 (de) * 1996-10-01 1998-04-09 Sfs Ind Holding Ag Befestigungselement zum Befestigen von Isolationsbahnen oder -platten und gegebenenfalls zusätzlichen Abdichtungsbahnen auf einem festen Unterbau sowie Verfahren zur Vormontage einer Unterlegscheibe an einem Schraubenschaft
WO1998014675A1 (fr) * 1996-10-01 1998-04-09 Sfs Industrie Holding Ag Element de fixation de bandes isolantes
US6183182B1 (en) 1996-10-01 2001-02-06 Sfs Industrie Holding, Ag Device for fixing insulating strips
DE19640585C2 (de) * 1996-10-01 2001-05-23 Sfs Ind Holding Ag Heerbrugg Befestigungselement zum Befestigen von Isolationsbahnen oder -platten und gegebenenfalls zusätzlichen Abdichtungsbahnen auf einem festen Unterbau sowie Verfahren zur Vormontage einer Unterlegscheibe an einem Schraubenschaft
EP1595040A4 (fr) * 2003-02-03 2009-11-04 Building Materials Invest Corp Plaque a double encoche comportant une attache
EP2354362A3 (fr) * 2010-01-13 2012-08-15 Heinrich Adriaans Dispositif de fixation pour l'ancrage d'éléments de construction sur un toit plat
US10253801B2 (en) 2015-09-29 2019-04-09 Simpson Strong-Tie Company Inc. Washer with shear tube
US11137016B2 (en) 2015-09-29 2021-10-05 Simpson Strong-Tie Company, Inc. Washer with shear tube
US10190616B2 (en) 2016-01-04 2019-01-29 Celcore Incorporated Roof cover fastener
USD844424S1 (en) 2017-06-23 2019-04-02 Celcore Incorporated Roof cover fastener
US12168992B2 (en) 2021-08-05 2024-12-17 The Hillman Group, Inc. Hardware assembly

Also Published As

Publication number Publication date
AU3804395A (en) 1996-05-02

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