Horizontally supported planar surfaces – Industrial platform
Patent
1981-06-29
1984-01-10
Lyddane, William E.
Horizontally supported planar surfaces
Industrial platform
B65D 1928
Patent
active
044247524
DESCRIPTION:
BRIEF SUMMARY
This invention generally relates to a loading pallet and it refers, more precisely, to a pallet of sheet metal and to a method of manufacturing the same.
Conventional pallets most often consist of a low-height structure of platform type, which is assembled of lumber by nailing, and in the side walls of which recesses are provided to be engaged by the lift-fork of a fork-truck. In spite of the deficiencies which this structure shows with respect to durability and service life, so far no pallet structure has been developed which suitably can replace and/or complete the wooden pallet.
In view of the strongly increasing wood price and the deterioration in wood quality, resulting in more expensive pallets of poorer quality and shorter service life, the demand for an improved pallet lately has increased. The object of the present invention is to meet this demand and to produce a pallet, which has at least as light a weight and is as durable as the wooden pallet, but is cheaper to manufacture and more hygienic than a pallet of wood, so that it can be applied even in the foodstuffs industry and in food distribution. In other respects, the pallet shall have all advantages of the wooden conventional pallet.
This object is achieved in that the pallet according to the present invention has been given the characterizing features defined in the attached claims. For manufacturing the pallet according to the invention in a simple and rational way, the invention also proposes a method with the features defined in the claims.
The invention is described in greater detail in the following, with reference to the accompanying drawings, in which
FIG. 1 is a perspective view of a preferred embodiment of the pallet according to the invention,
FIG. 2 is a perspective and cross-sectional view of a pallet detail,
FIG. 3 is a vertical section along substantially the line III--III in FIG. 2,
FIG. 4 is a view from above of a metal sheet for manufacturing a pallet according to the invention, and
FIG. 5 is a section through a lifting bar comprised in the pallet.
The pallet according to the present invention comprises a metal sheet 1 with preferably trapezoid corrugations 2. The sheet 1 constitutes a platform 3 acting as a carrying plane, which is supported on box-shaped or, more correctly, U-shaped support or carrying beams 4, which extend perpendicularly relative to the sheet corrugations and between themselves form a free space 5 beneath the platform 3, into which space the fork of a loader can be inserted from one side or the other.
Each of the supporting beams 4 is formed of the same sheet metal blank as the platform, in such a manner, that a corrugated sheet metal blank cut to desired length is bent in three suitably spaced places so that corners 6, 7 and 8 are obtained. The distance between the corners 6 and 7 determining the beam width can be varied for obtaining supporting beams 4 of a greater or smaller width, but the distance between the corners 7 and 8, of course, shall be substantially the same as the distance between the corner 6 and the free end 9 of the sheet, so that the end portion 10 constituting the inner surface of the beam abuts the lower surface of the platform by said end 9 and acts as a supporting leg for the platform, thereby increasing the bearing capacity thereof.
Each such end portion 10 is inserted with its free end 9 into a locking groove 11 extending perpendicularly to the corrugations 2, and by said groove 11 the respective end portion 10 is fixed and locked relative to the platform in a vertical positon, as clearly appears from FIG. 3. The locking grooves 11 are formed each in a lifting bar 12, which extends across the entire width of the pallet and at the same level as the locking groove bottom 13 is provided with an attachment strip 14, which like the locking groove bottom abuts the lower surface of the platform and is connected thereto by pop rivets or by bent-over locking tips 15, which are punched out of the attachment strip 14, possibly also of the locking groove bottom 13, and of the platform, as sh
REFERENCES:
patent: 1508898 (1924-09-01), Smith
patent: 1612382 (1926-12-01), Lehman
patent: 2123714 (1938-07-01), Clark
patent: 2544743 (1951-03-01), Vrabcak
patent: 2615661 (1952-10-01), Cushman
patent: 4326467 (1982-04-01), Schleicher et al.
Groko Maskin AB
Lyddane William E.
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