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WO1991019909A1 - Fastening means - Google Patents

Fastening means Download PDF

Info

Publication number
WO1991019909A1
WO1991019909A1 PCT/SE1991/000427 SE9100427W WO9119909A1 WO 1991019909 A1 WO1991019909 A1 WO 1991019909A1 SE 9100427 W SE9100427 W SE 9100427W WO 9119909 A1 WO9119909 A1 WO 9119909A1
Authority
WO
WIPO (PCT)
Prior art keywords
counterstay
hole
fastening device
thin
screw
Prior art date
Application number
PCT/SE1991/000427
Other languages
English (en)
French (fr)
Inventor
Harry Lilja
Original Assignee
Ab Volvo
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 Ab Volvo filed Critical Ab Volvo
Priority to EP91911698A priority Critical patent/EP0535087B1/en
Priority to DE69103632T priority patent/DE69103632D1/de
Publication of WO1991019909A1 publication Critical patent/WO1991019909A1/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B5/00Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/02Joining 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
    • F16B5/0208Joining 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 using panel fasteners, i.e. permanent attachments allowing for quick assembly
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B31/00Screwed connections specially modified in view of tensile load; Break-bolts
    • F16B31/02Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B37/00Nuts or like thread-engaging members
    • F16B37/04Devices for fastening nuts to surfaces, e.g. sheets, plates
    • F16B37/041Releasable devices

Definitions

  • the present invention relates to a fastening device, primarily for fixing a preferably expansive thin-walled element to a preferably likewise thin-walled component.
  • Fastening devices are previously known of the type which comprise a screw with a shank and a head and a counterstay with a hole which cooperates with the threads on the screw and whereby the counterstay is easily attachable to a component intended therefor.
  • This type of fastening device is commonly used in the car industry for, for example, fastening various sheet components. It is a general goal to optimize such fastening devices, especially with regard to both manufacturing and assembly aspects predominently on an economic scale.
  • the object of the present invention is to provide a fastening device which overcomes the above described disadvantages.
  • the shank of the screw presents a preferably threadless portion whose outer diameter is at least less than the outer diameter of the adjacent lower region of the thread and the smallest diametrical clearance of the hole which cooperates with the screw threads.
  • Fig. 1 is a side view of an assembled fastening device
  • Fig. 2 is a plan view of a counterstay for a fastening device according to the invention
  • Fig. 3 is a section view along line A-A of Fig. 2
  • Figs 4a, 4b show a first modification of a counterstay according to Fig. 1
  • Figs 5a, 5b show a second modification of a counterstay according to Fig. 1
  • Fig. 6 is a side view of a second embodiment of a device according to the invention
  • Fig. 7 is a modification of a counterstay according to
  • Fig. 6, Fig. 8 is a side view of a device according to the invention which is applied with help of adhesives,
  • Fig. 9 is a plan view of a counterstay according to Fig. ⁇
  • Fig. 10 is a modification of a counterstay according to Figs 8 and 9.
  • FIG. 1 A preferred embodiment of the invention is shown in Fig. 1 and consists of a screw 1 and a counterstay 2.
  • the counterstay 2 is inserted in a recess 40 in a thin-walled component 4.
  • a thin-walled element 3 is fastened to the thin-walled component 4 with the aid of the screw 1, the tapered surface 11 of whose screw head abuts against a conical countersink 30- in the thin-walled element 3.
  • the screw shank 10 is provided with threads 14 which cooperate with a hole 20 in the counterstay 2.
  • the cooperating hole 20 in the counterstay 2 is arranged in a first part 21 of the counterstay 2, which part 21 is arranged essentially parallel to a second part 22 by means of said first part 21 being bent upwardly to this position in the same plane as said second part 22.
  • the second part 22 is also provided with a hole 27 which has a larger diameter than the first mentioned hole 20 so that the second hole 27 can not cooperate with the threads 14 and the screw 1.
  • the counterstay 2 is provided with abutment flanges 24 and obliquely directed wings 23 cooperating therewith for fastening the counterstay 2 to the component 4.
  • the wings 23 spring inwardly during insertion of the counterstay 2 so that a snapping-in occurs.
  • the counterstay 2 can be applied to the component 4 in a direction which principally corresponds with the normal to the surface of the element 3 and the component 4. This direction of the normal also corresponds to the axial extension of the screw. Accordingly, the counterstay and screw in this preferred embodiment can be applied in one and the same direction which can have considerable advantages from an assembly point of view.
  • the screw shank 10 is provided with a threadless portion 12.
  • This threadless portion 12 ensures that the hole 20 for the threads 14 can not be pulled through and that the retaining force, the clamping force, for the fastening device can be predetermined depending upon the spring force of the upper sheet 21 which is effected via the curved portion 29 with which it is connected to the lower part 22 of the counterstay.
  • a further factor which affects the clamping force is of course the position of the axial end surface 15 of the threads 14.
  • the counterstay 2 is shown in plan view in Fig. 2.
  • the hole 20 is provided with a slot 28 and that the hole 20 is to be found in the upper part 21 which is connected to the lower part 22 via a curved bent portion 29.
  • the lower part 22 comprises a second hole 27 with a diameter which is considerably larger than that of the first mentioned hole 20. It can further be seen that the longitudinal extension of the obliquely directed side surfaces 23 do not extend for as long as the abutment flanges 24.
  • Fig. 3 there is shown a section through the upper part 21 of the counterstay 2. The section shows that the pitch of thread for the hole is provided by bending the two side surfaces around the slot 28.
  • Fig. 4 shows a plan view of a first modified counterstay 2 according to the invention.
  • Fig. 4b shows the same counterstay in a longitudinal section.
  • the modified counterstay differs from the counterstay according to Fig. 1 in that it is provided with a torque reinforcing part 5 which accordingly increases the spring resistance of the counterstay.
  • the torque reinforcing part 5 consists of a portion bent up from the lower part 22. This part, in the same way as with the part 21 provided with the thread hole 20, is also shaped with a curved region 52. In order to provide space for the screw 1, the torque reinforcing part 5 is arranged with a larger recess 51 which is consequently centrally located in relation to the threaded hole 20.
  • Figs 5a and 5b show a second modification of a counterstay 2 according to the invention.
  • the torque reinforcement part 5 in the latter mentioned case, functions more as a passive abutment for the threaded part 21 whilst the embodiment according to the modification presents a torque reinforcing part of a more active type.
  • 1A second embodiment of the invention is shown in Fig. 6 where the screw 1 is essentially shaped the same as described earlier, with the difference that not all the entire upper region of the threads 14 is removed, but only a reduced threadless portion 12 is provided.
  • the counterstay 2, however, is of a different type and in a side profile as shown in Fig. 6 presents an S-like shape.
  • the two branches which contain larger holes 25, 26 are hereby intended to project around the component 4 to which they are intended to be affixed.
  • the outer spring part 21 of the counterstay is provided with a smaller hole 20 for cooperation with the threads 14 of the screw 1.
  • a resilient tensioning force is also maintained in this case thanks to a curved region 29.
  • the counterstay 2 according to this embodiment has also been produced with the help of stamping and bending.
  • a modified counterstay 2 is shown in Fig. 7 for a device according to the invention in accordance with Fig. 6.
  • the middle portion 26 is provided at its one end with a bulge 53 which abuts against the outer part 21 in the region of its free end.
  • Counterstays 2 are shown in Figs 8, 9 and 10 which are affixed as necessary with adhesives.
  • Such a counterstay 2 is shown in Fig. 8 arranged on a first sheet 4 with help of an adhesive agent 6.
  • the sheet presents rotation-preventing embossings 45 arranged to prevent rotation of the counterstay 2.
  • the outer sprung part 21 is provided with a hole 20 which cooperates with the threads on the screw 1. With help of the thus applied counterstay 2, it is possible to simply apply a thin-walled expansive element 3 to the first mentioned sheet 4 with help of a screw 1.
  • Fig. 9 shows the counterstay according to Fig. 8 in plan view.
  • the figure shows that the sheet 4 is provided with embossings 45 on both sides of the counterstay 2.
  • the figure further implies that the sheet 4 and the inner part 22 of the counterstay 2 are each provided with a hole large in relation to the threaded hole 20. This hole is centred in relation to the threaded hole 20 of the counterstay 2.
  • Fig. 10 shows a glued counterstay 2 in cross section and which counterstay is provided with a torque reinforcing part 5.
  • the torque reinforcing part 5 consists of a portion 54 of the lower part 22 of the counterstay 2 bent upwardly at 90°.
  • a big advantage with the invention is that the maximum clamping force of a tightened fastening device is, in practice, independent of the torque with which it is tightened. This means that one and the same type of tool can be used for all assembly of such fastening devices and thereby always achieve optimal clamping force without need to adjust the torque.
  • One precondition is however that all tools in this instance deliver a maximum torque which is at least as great as the torque which is necessary to tighten the largest sized fastening device.
  • a solution in accordance with the invention thus always provides optimally tightened fastening devices which, amongst other things, implies constant levels of tighting force for the same embodiment,
  • the invention is not restricted to that described above but can be varied within the scope of the appended claims. Accordingly, the invention can also be used for components other than those with thin walls, for example for joining thick-walled elements to thick-walls components. Furthermore, the screw shaft does not need to have a completely threadless portion, it is sufficient if the outer diameter in this portion is less than the smallest diametrical clearance of the hole 20.
  • a resilient function of the counterstay itself is desirable but can for example be compensated for by means of resilient properties of for example the component.
  • the shown counterstay, which is made from one piece, with the curved bent spring portion has advantages from a manufacturing point of view, but other solutions, for example parts provided with a flexible adhesive means are also possible.
  • the counterstay is rotatably fastened.
  • the device shown in Fig. 6 can also be provided with the sprung part 21 against the screw l if there is sufficient space.
  • the torque increasing device 5 can, in many of the shown examples, be arranged on the corresponding part of the counterstay 2, in Fig. 10 for example the leg 54 can just as well be provided on the outer part 21.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Plates (AREA)
  • Insertion Pins And Rivets (AREA)
  • Clamps And Clips (AREA)
PCT/SE1991/000427 1990-06-18 1991-06-13 Fastening means WO1991019909A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP91911698A EP0535087B1 (en) 1990-06-18 1991-06-13 Fastening means
DE69103632T DE69103632D1 (de) 1990-06-18 1991-06-13 Befestigungsmittel.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9002160A SE467370B (sv) 1990-06-18 1990-06-18 Faestanordning med optimal klaemkraft
SE9002160-1 1990-06-18

Publications (1)

Publication Number Publication Date
WO1991019909A1 true WO1991019909A1 (en) 1991-12-26

Family

ID=20379797

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1991/000427 WO1991019909A1 (en) 1990-06-18 1991-06-13 Fastening means

Country Status (5)

Country Link
EP (1) EP0535087B1 (sv)
AU (1) AU8191991A (sv)
DE (1) DE69103632D1 (sv)
SE (1) SE467370B (sv)
WO (1) WO1991019909A1 (sv)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2866080A1 (fr) * 2004-02-05 2005-08-12 Attax Systeme de fixation de deux pieces l'une sur l'autre.
WO2006032223A1 (de) * 2004-09-22 2006-03-30 Aus Service Gmbh & Co. Kg Befestigungselement zur arretierung von vogelschutzhauben

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6854946B2 (en) 2002-08-22 2005-02-15 Allegiance Corporation Flexible retainer clip

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB700061A (en) * 1951-03-20 1953-11-25 United Carr Fastener Corp Improvements in and relating to fastening devices
DE943561C (de) * 1952-06-24 1956-05-24 Junker & Ruh A G Schraubensicherung
GB1494315A (en) * 1975-01-17 1977-12-07 Rhodes D Cavity fixing
GB2162272A (en) * 1984-07-24 1986-01-29 Trw Inc Clip for mounting fasteners
SE449906B (sv) * 1981-05-26 1987-05-25 Mecano Simmonds Gmbh I ett stycke utford klammerliknande platmutter
US4790702A (en) * 1986-03-27 1988-12-13 Maganias Nicholas H Nut and bolt assembly

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB700061A (en) * 1951-03-20 1953-11-25 United Carr Fastener Corp Improvements in and relating to fastening devices
DE943561C (de) * 1952-06-24 1956-05-24 Junker & Ruh A G Schraubensicherung
GB1494315A (en) * 1975-01-17 1977-12-07 Rhodes D Cavity fixing
SE449906B (sv) * 1981-05-26 1987-05-25 Mecano Simmonds Gmbh I ett stycke utford klammerliknande platmutter
GB2162272A (en) * 1984-07-24 1986-01-29 Trw Inc Clip for mounting fasteners
US4790702A (en) * 1986-03-27 1988-12-13 Maganias Nicholas H Nut and bolt assembly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2866080A1 (fr) * 2004-02-05 2005-08-12 Attax Systeme de fixation de deux pieces l'une sur l'autre.
WO2006032223A1 (de) * 2004-09-22 2006-03-30 Aus Service Gmbh & Co. Kg Befestigungselement zur arretierung von vogelschutzhauben

Also Published As

Publication number Publication date
DE69103632D1 (de) 1994-09-29
SE9002160L (sv) 1991-12-19
EP0535087A1 (en) 1993-04-07
AU8191991A (en) 1992-01-07
SE467370B (sv) 1992-07-06
EP0535087B1 (en) 1994-08-24
SE9002160D0 (sv) 1990-06-18

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