Horizontally supported planar surfaces – With housing – Surface slidably hinged to housing wall
Patent
1998-10-16
2000-02-22
Chen, Jose V.
Horizontally supported planar surfaces
With housing
Surface slidably hinged to housing wall
100 42, A47B 300
Patent
active
060267526
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a work surface attached to a wall element or a door of a switchgear cabinet, which can be brought from a parallel stowed position into a flipped-down work position.
2. Description of Prior Art
The known work surfaces of this type are attached like leaves to a wall element or a door of a switchgear cabinet. Here, the lower horizontal side of the work surface is hinged on the wall element or the door by a hinge or the like. The vertical sides of the working surface are connected by leaf holders, known per se, with the wall element or the door. As shown in German Patent Reference DE 43 12 816 A1, the leaf holders have two guide rods, which are hingedly connected with each other, and whose free ends are hinged to the work surface, or respectively the wall element or the door. In the extended position of the two guide rods, the leaf holders determine the work position of the work surface, while in the stowed position they are pivoted on each other. In the work position of the work surface the leaf holders extend over at least a portion of the two sides of the work surface and therefore more or less hamper working on the work surface.
A switchgear cabinet with a circuit diagram pocket is shown in German Patent Reference DE 36 38 454 A1. The circuit diagram pocket can be pivoted into the desk position by guide pins and a crank guide.
German Patent Reference DE 41 21 660 A1 shows a folding table with a table top which can be folded out and which is pivotally and displaceably held in lateral frame sections with its inner end. The table top is hinged on pivotal strips and can be brought into a horizontal position by displacing and rotating its end.
SUMMARY OF THE INVENTION
It is one object of this invention to attach a work surface of the type mentioned at the outset in such a way that, after two vertical sides are brought into a work position above the work surface, the two vertical sides are free and permit unhampered work thereon.
In accordance with this invention this object is attained because the horizontal side of the work surface which is on top in the stowed position is guided, vertically adjustable, by means of hinge bolts in insertion grooves fixed in the wall element or door. The lower ends of the guide grooves make a transition via transition sections pointing away from the wall element or the door into upward pointing holding receptacles for the hinge bolts. The vertical sides of the work surface are hingedly supported by means of respectively a guide rod on the wall element or on the door, wherein the hinge points at the work surface are arranged below the hinge bolts, and the hinge points at the wall element or the door are arranged below the holding receptacles of the guide grooves and are laid out with the size of the guide rods in such a way that, when the hinge bolts are inserted into the holding receptacles, the work surface takes up the desired work position with respect to the wall element or to the door.
To place the work surface into the work position, it is grasped at the lower horizontal side and lifted. In the process the slide bolts slide downward in the guide grooves. Shortly before reaching the work position, the work surface is slightly moved away from the wall element or the door in the transition sections, guiding the hinge bolts into the holding receptacles of the guide grooves under its own weight and in this way is fixed in the work position. If the work surface is returned again into the stowed position parallel with the wall element or the door, the free, projecting side of the work surface is slightly lifted, whereupon the hinge bolts leave the holding receptacles of the guide grooves. By a slight displacement of the work surface in the direction toward the wall element or the door, the transition sections are overcome and the hinge bolts reach the vertical areas of the guide grooves. If the work surface is released, driven by its own weight it moves into a stowed position, which is reached at
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Chen José V.
Rittal--Werk Rudolf Loh GmbH & Co. KG
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