Metal working – Method of mechanical manufacture – Obtaining plural product pieces from unitary workpiece
Patent
1983-10-19
1985-06-04
Goldberg, Howard N.
Metal working
Method of mechanical manufacture
Obtaining plural product pieces from unitary workpiece
52153, 52154, B23D 1700, E04H 1220
Patent
active
045205450
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to anchoring of elements, especially but not exclusively fence posts or stakes, in the ground.
THE PRIOR ART
In the first Addition to French Pat. No. 79 09679 filed Apr. 10, 1979 by the Applicant for: "A peg for use in fastening posts or stakes in the ground, and devices for use in driving said pin in", there has been disclosed a peg consisting of two portions of shaped metal plates, preferably zigzag-shaped, each defining a fin shaped so as to facilitate its downwards penetration into the ground and to provide it with strength in the transverse direction after it has been driven down, said fin including a folded edge so as to form a prismatic sleeve open along an edge, these two sleeves being nested in each other to form a centrally extending prismatic sheath all along the peg vertical dimension.
Such a peg provides an effective anchorage of a stake which has only to be inserted into the sheath and does not need to be sealed. It can be easily installed and is sufficiently stiff even where it is made from a thin metal plate.
OBJECT OF THE INVENTION
The present invention relates to a method of making pegs of the above-mentioned kind, adapted to reduce the machining steps and the amount of scrap metal, which can be made by a continuous method of manufacture from a strip and adapted to provide varying forms suitable to all requirements.
SUMMARY OF THE INVENTION
The method in accordance with the invention is mainly characterized in that the above-described sleeve is obtained by shaping both edges of a strip adapted to form a plurality of pegs, and each fin is obtained by cutting the strip material both in a direction orthogonal to the sleeve generatrixes to form sections of the thus shaped strip each having a length corresponding to the peg vertical dimension, and, on the other hand along a diagonal plane of each section.
By so diagonally cutting each section, there are provided a pair of fins which may be folded or bent during the edge shaping step and the sleeves of which, advantageously being open only by a slot adapted to enable the two sleeves of the two fins to be locked to each other so that the two fins can preferably be joined to each other through their respective sleeves sliding into each other, will thus become bevelled at one end thereof and, without any additional machining, be shaped into a pointed tip allowing penetration, the corresponding amount of scrap metal being very small and dropping by itself upon said diagonal cutting.
Other features and advantages of the invention will become readily apparent from the detailed disclosure hereinbelow.
BRIEF DESCRIPTION OF THE DRAWING
In the appended drawing:
FIG. 1 shows the shaped and cut strip sections illustrating the method of the invention;
FIG. 2 shows how half-sections of the strip are joined to each other to form a peg;
FIG. 3 is a side elevation of a peg sheath obtained through interlocking of the two sleeves of the respective half-sections; and
FIGS. 4 and 5 show end views of two different modes of assembly of the same half-sections being unsymmetrically folded.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The method of the invention, in a first embodiment thereof, comprises continuously forming a shaped section from a long strip, e.g. of metal plate, by means of a press, by folding the strip edges to form sleeves 1 and 2 and, if appropriate, by folding or bending the intermediate strip portion 3, and then continuously cutting said shaped section into sections A.sub.1, B.sub.1, A.sub.2 B.sub.2, . . . along cutting lines in succession perpendicular to the sleeve generatrixes and diagonal thereto, i.e. extending from a corner of a section such as A.sub.1 B.sub.1 to the opposite corner of the same section.
All the half-sections A.sub.1, B.sub.1, etc. are exactly identical to each other in the embodiment of FIG. 1 wherein the intermediate strip portion 3 has been left planar and sleeves 1 and 2 are fully symmetrical. It would be the same if the strip portion 3 had been symmetrically be
REFERENCES:
patent: 2206625 (1940-07-01), Beach et al.
patent: 2227553 (1941-01-01), Paque
patent: 3132726 (1964-05-01), Johnson
patent: 3727357 (1973-04-01), Stillman
patent: 3969853 (1976-07-01), Deike
patent: 4004383 (1977-01-01), Watanabe
patent: 4252472 (1981-02-01), Maraly
Drucker William A.
Goldberg Howard N.
Nichols Steven
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