Closure fasteners – Bolts – Multiple
Patent
1988-05-25
1991-03-12
Nicholson, Eric K.
Closure fasteners
Bolts
Multiple
292160, 292DIG68, E05C 912
Patent
active
049987577
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a bar closure for installation in one or two rectangular apertures in the fillet gap region of sheet metal doors.
1. Discussion of Prior Art
A rod closure can be found in DEP 34 07 700.
This rod closure has an advantage over other prior art constructions, such as in the German utility model 85 05 588 or the European patent 0 054 225, in that strip-shaped slide bars are used, so that the overall width of the bar closure remains significantly smaller than in the previous constructions and can also be placed in the relatively narrow fillet gap of sheet metal doors. This method of placing offers advantages that the inner clear volume of a switch cabinet (control cabinet) is fully available for other structural parts, such as switching devices, the space which would otherwise be dead is utilized, and the bar closure is outside of the region of the cabinet to be sealed off so that sealing devices are superfluous.
With special construction of the ends of the slide bars (arrangement of denticulations on both narrow sides of the ends of the slide bars), these slide bars are usable for left and right-attached switch cabinet doors. However, the bars (in the case of a preassembled lock) cannot, in simple manner, be exchanged. Rather, the pinion must be dismounted tediously from the lock, the bars must be taken out, exchanged in the intended manner, again replaced, and the pinion must be mounted anew. This is particularly true if a continuous slide bar is used. Such a bar cannot be slid into the guide channel of a pre-assembled lock box. But even in the case of non-continuous bars, in which the slide bar is provided with the denticulation at the end and, therefore, can per se be slid into the lock box from above or below, this sliding is due to still other guide devices and may only be possible after disassembling other structural parts. If the locking device arranged on the bar is formed by cuts in the bar, as is apparently provided in the prior art's bar closure (see European patent application 85 111 937.0 with the publication number 0 176 890), it is, in addition, difficult to use the bar on the left as well as on the right or to change the actuation device, because the bilateral cuts, which would in that case be necessary, could bring about considerable weakening of the bar.
SUMMARY OF THE INVENTION
It is an object of the invention to form a bar closure in such a way that it cannot only be used right and left, but that also the locking and opening direction of the lock can be freely determined so that subsequent changes can be made without involved disassembly work and without much weakening of the bar(s).
Furthermore, actuation with respect to the flat bar should be as axial as possible in order to preclude undesirable tilting, which increases friction. Such tilting phenomena is not always preventable in the prior bar closures.
Moreover, the armature consists of a minimum number of parts, is smooth-running, and permits ease of closing even if the locking devices must have a large contact slope because of provided sealing devices.
This is obtained by constructing the bar or bars, as well as a lock nut and bar bearing guiding the bar(s) in the region of the lock, symmetrically or double-symmetrically without disassembling the pinion. In this manner, the bar closure can be used for right and left-closing doors with the opening direction of rotation of the lock actuating device being freely selectable by turning or exchanging the bar(s) and/or turning the lock.
The bar closure of the invention can be used extraordinarily flexibly, can be easily assembled because the bars are identical, and is also particularly inexpensive to produce. In contrast, the bars based on prior art are not always entirely identical (the bar extending upward is, for example, shorter than that extending downward). In addition, the state of the art does not readily permit exchanging the bars.
In the prior art, only the arrangement of a lever closure is described.
REFERENCES:
patent: 2166535 (1939-07-01), Sarenholm et al.
patent: 3110512 (1963-11-01), Scale et al.
patent: 4368905 (1983-01-01), Hirschbein
patent: 4616864 (1986-10-01), Douglas
patent: 4648636 (1987-03-01), Reynard
patent: 4754624 (1988-07-01), Fleming
patent: 4848811 (1989-07-01), Lauftsnberg et al.
patent: 4930325 (1990-06-01), Ramsauer
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