Closure fasteners – Bolts – Multiple
Patent
1988-05-25
1991-09-03
Nicholson, Eric K.
Closure fasteners
Bolts
Multiple
292142, 292337, E05L 106
Patent
active
050446770
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a bar guideway for the flat strip bar of a bar closure which in particular is provided for installation in the fillet gap of sheet metal cabinet doors and in which the flat strip bar does not have any or has only tediously disassemblable locking means such as pins, hooks, roll pins or double roll pins.
2. Prior Art Background
A bar guideway for the flat strip bar of a bar closure, which is arranged in the fillet gap of sheet metal cabinets, is known from European Patent 01776890. The bar guideway described there is provided with recesses and functions to guide the bars and for locking, e.g. for accepting a peg carried by the body of the cabinet upon the sheet metal cabinet door being closed. Subsequently, an axial section of the flat strip bar slides onto said bar guideway and brings about locking. This yields a relatively stable locking. However, this kind of locking requires very precise installation of the bar guideway and requires the bolt to be received by the bar guide, so that the door can be closed properly. In addition, another disadvantage is that locking can only take place at the ends of the bar should the bar of the bar closure be intended for right as well as for left closing doors. For example, greater sheet metal cabinet heights and greater loads, through the explosion pressure of arcs within the switch cabinet. It can, however, become necessary, to fix the door panel not only above and below, but also at intermediate levels, which, with the known bar closure, cannot be realized at all or only by accepting other disadvantages such as nonsymmetry cf the bars of the bar closure.
A further disadvantage of the known bar guideway is that the bar can only be introduced into the guideway by sliding it axially from above or below. With particular constructions of the bar closure, this can lead to difficulties or it can be completely impossible.
A further disadvantage of the subject matter of the above-mentioned publication is that no explanation is given regarding the method by which the bar guideway is fastened on the door panel.
SUMMARY OF THE INVENTION
It is the task of the invention to further develop a bar guideway so that the kind of fastening on the door panel becomes clear. In particular, the bar guideway does not need to be slid onto the bar axially, nor does the bar need to be slid axially into the bar guideway, but rather the bar guideway can be slid laterally onto the bar. The bar guideway can be clipped on or applied in a similar fashion, so that sliding the entire bar axially through the bar guideway become superfluous.
This task is solved by implementing one of two alternative constructions. In the first alternative, the bar guideway has an L-shaped cross-section of resiliently elastic material such as synthetic material The bar guideway has a pair of legs extending from a corner area so that the legs and corner area together form the L-shaped cross-section. One leg has a fastening hole and the other leg has a free edge. Extending from the free edge and from the corner area are projecting guide rails each with a hook-shaped profile, which forms a guide track in which is guided the flat strip bar. The second alternative, fulfills the same task. However, the bar guide comprises a first L-shaped corner piece, of which is provided with a first aperture or cut for receiving the set bolts for fastening the screws on the door panel corner and the other leg forms a guideway for the surface of the flat strip bar directed away from the door panel corner. The bar also comprises a second L-shaped cornerpiece, one leg of which is provided with a second aperture for fastening with screws to the first angle, and the other leg of which forms a guideway for the other surface of the flat strip bar lying toward the door panel corner and forms at the end a hook reaching around the one narrow side of the flat strip bar.
Both solutions have the advantage that the flat strip bar they are to carry does not need to be slid thr
REFERENCES:
patent: 4002360 (1977-01-01), Frank et al.
patent: 4063763 (1977-12-01), Van Heryten
patent: 4616864 (1986-10-01), Douglas
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