Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Including sleeve and distinct tapered expander
Patent
1996-07-31
1998-06-02
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Including sleeve and distinct tapered expander
411 41, 411 60, 24297, F16B 1306, A44B 104
Patent
active
057590028
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a fastener device for securing a cover plate or like element, said fastener device including a hole-mounted first fastener part which includes a cover plate supporting surface, and a second fastener part which interacts with said first fastener part and functions to fix and secure the first part in said hole, such as to provide a fastening for a cover plate or like element.
Fastener devices which consist in two interacting parts are previously known from DE-A 4,111,374 and SE-B 423,832. These known fastener devices include a first fastener part having a flange and a through-pierced portion for insertion into a hole, and a second fastener part which is configured for insertion into said through-piercing hole, wherein the insertable portion of the first fastener part is deformed as the second fastener part is inserted therein, so as to be able to secure a plate or like element.
SUMMARY OF THE INVENTION
For the purpose of readily securing a cover plate to a rack cabinet for, e.g., telecommunications equipment, such as to obtain reliable and secure fastening of the plate, there is provided a plastic fastener device which consists in two interacting parts, i.e. a fastener part and a pin. The fastener part is comprised of a pierced shaft portion and two connected flanged collars. The pin, which may be provided with a through-penetrating hole, is intended to be driven into the pierced shaft portion and therewith deform the same. The shaft portion includes conical tabs or like appendages which when the shaft portion is inserted into a hole on a rack cabinet and the pin is driven into the through-pierced shaft portion are deformed such as to affix and secure the collared shaft portion in said hole. The cover plate can now be pushed onto the fastener device, between the two collar flanges.
The firmness with which the plate is secured and the ease with which the plate can be removed is determined by the distance between the collars and the thickness and shape of the plate.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 illustrates an inventive fastener device comprising an fastener part and a pin, and shows the device as a one-piece moulded article.
FIG. 2a illustrates an end view the pin of the fastener device shown in FIG. 1.
FIG. 2b is a side view of the pin of FIG. 2a.
FIG. 3 is a sectioned view of the fastener part of the device shown in FIG. 1.
FIG. 4 shows the pin partially inserted into the fastener part in FIG. 3.
FIG. 5a is a bottom end view, of the fastener part in FIG. 1.
FIG. 5b is a side view of the fastener part showing a tab in full view.
FIG. 5c is a top end view of the fastener part.
FIG. 5d is a side view of the fastener part rotated about the longitudinal axis to show a gap between adjacent tabs.
FIG. 6 is a simplified illustration of part of a rack cabinet.
FIG. 7 shows the fastener part inserted in a hole on one part of a rack cabinet, and also shows an associated pin ready for insertion.
FIG. 8a shows a front view of a cover plate.
FIG. 8b shows a side view of the cover plate of FIG. 8a.
FIG. 9 shows the cover plate and the fastener device from above.
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 illustrates an inventive fastener device, which in the illustrated case is delivered in the form of a one-piece plastic moulded product, with the pin 1 and the fastener part 2 joined together by a moulding part 3. As shown at 4 in FIG. 2, the pin is bevelled at both ends and includes a through-penetrating hole 5, partially for reasons of a moulding/technical nature. FIG. 3 is a sectional view of the fastener part 2, which will be seen to include two flange-like collars 6, 7 and tabs or like appendages 8. The upper collar 6 is thicker than the lower collar 7 and includes a supportive surface 18. The thickness of the upper collar is determined partially to be able to withstand external forces, for instance to prevent the junction 9 between collar and shaft breaking should the pin be positioned obliquely (see FIG. 4) when being inserted into the fastener part, and such t
REFERENCES:
patent: 2657894 (1953-11-01), Sklenar
patent: 3203304 (1965-08-01), Rapata
patent: 3595506 (1971-07-01), Saunders
patent: 4715095 (1987-12-01), Takahashi
patent: 5322402 (1994-06-01), Inoue
patent: 5540528 (1996-07-01), Schmidt et al.
Telefoanktiebolaget LM Ericsson
Wilson Neill R.
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