Supports: racks – Knockdown
Patent
1984-02-21
1986-04-29
Moon, Charlie T.
Supports: racks
Knockdown
29446, 29452, 29526R, 52291, 52640, A47B 4700, A47F 4300, A47F 5700, B21D 3900
Patent
active
045851298
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a method for stiffening a structure diagonally, by means of two mutually intersecting wire-like or rod-like stays, which are attached to the structure at four attachment locations, and to devices for carrying out the method.
With previously known methods and devices intended for the aforementioned purpose, the ends of the stays are normally screwed into the construction while stretching the stays and locating the structure in its intended position. It is difficult to tension the stays precisely to the extent required, and as a rule some final adjustments need to be made, these adjustments requiring the arrangement of special tools for each of the stays, for example the arrangement of tensioning devices, such as tensionscrews. When the structure is a shelving-frame structure requiring diagonal stays on the rear side thereof, the aforesaid devices must be mounted, and possibly adjusted, from the rear of the shelving structure. This is impracticable, and the arrangement of associated attachment and tensioning means is relatively expensive.
The object of the present invention is to provide a substantially simpler and more readily handled stay arrangement for stiffening structures diagonally.
This object is realized in accordance with the invention by means of the method and the device set forth in the following claims.
Thus, the stays can be readily mounted without requiring precise initial adjustment of the stays and without requiring the structure to be fixed in its precise upright position at the same time as making the mounting operation. The stays are namely adjusted in a subsequent operation, firstly by displacing the point of intersection of the stays in a manner such that one or both stays become slightly curved, whereafter the stays are firmly connected together at said displaced point of intersection, i.e. connected either permanently or detachably.
For example, when mass producing open-rung shelving supports, where the structure is stiffened diagonally, the aforementioned connection can be made in a simple and ready fashion, by means of a spot weld made at each displaced stay-intersection point. The connection can also be made manually, for exmaple when assembling the structure in its intended location, suitably by means of a friction fastener provided with screws, the fastener being arranged to clamp firmly around the stays at said point of intersection. Even a light tightening of the fastener has been found to provide surprisingly reliable and positive retention of the stays. Such a friction fastener enables subsequent adjustments to be made with ease, for example when it is subsequently found necessary to move the shelving structure slightly, on an uneven floor, or in the event of subsequent settling of the floor on which the structure stands, causing the shelving structure to be crooked and therefore making final adjustments necessary. In this respect, in accordance with a particularly preferred embodiment of the invention, the friction fastener is suitably designed so that the fastener can be loosened, adjustments made, and the fastener re-tightened, all from the front of the shelving structure, i.e. so that the shelving structure, for example, need not be moved away from a wall in order to make the ncessary adjustments, and then moved back against the wall.
The invention will now be described in more detail with reference to a number of embodiments of arrangements according to the invention illustrated in the accompanying drawings, in which drawings,
FIG. 1 is a rear view of a staging structure stiffened diagonally in accordance with the invention;
FIG. 2 is a part view, illustrating the anchoring of one of the ends of the stays in FIG. 1;
FIG. 3a is a side view, and
FIG. 3b a front view of the joint connection at the point of intersection of the stays in FIG. 1;
FIG. 4 shows the end of one stay anchored in an angled, shaped section;
FIG. 5 is a view showing the ends of the stays anchored in a tube;
FIGS. 6a and 6b are front views and side views respectively, s
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